Y. Takikawa

发表

An Efficient Synthesis of Phenanthroindolizidine Core via Hetero Diels-Alder Reaction of In Situ Generated α-Allenylchalcogenoketenes With Cyclic Imines

K. Shimada, T. Korenaga, Mariko Suzuki, 2019, Natural Product Communications.

Synthesis of δ-thiolactams by the aza-Diels–Alder reaction of in situ generated allenyltrimethylsilylthioketenes with imines

K. Shimada, Mariko Suzuki, S. Aoyagi, 2006 .

Synthesis of Isochalcogenazole Rings by Treating β-(N,N-Dimethylcarbamoylchalcogenenyl)alkenyl Ketones with Hydroxylamine-O-sulfonic Acid

K. Shimada, Toshio Saitô, S. Aoyagi, 2007 .

Regioselective synthesis of polysubstituted pyridines via hetero-Diels-Alder reaction of isotellurazoles with acetylenic dienophiles

K. Shimada, S. Ogawa, S. Aoyagi, 2009 .

Conversion of amides, N,N,N',N'-tetramethylurea, and esters to the corresponding selenoxo compounds by treatment with bis(trimethylsilyl) selenide and BF3.OEt2

K. Shimada, Hiroyuki Watanabe, Y. Takikawa, 1994 .

A Convenient Preparation of 3,5-Disubstituted 1,2,4-Selenadiazoles from Primary Selenoamides by Treatment with N-Bromosuccinimide

K. Shimada, Y. Takeishi, Y. Takikawa, 1991 .

Novel synthesis of 1,3,5-triselenanes from aldehydes, and novel generation of selenoaldehydes by fragmentation of 1,3,5-triselenanes☆

K. Shimada, Hiroyuki Watanabe, Y. Takikawa, 1989 .

REACTIONS OF 9-NITROANTHRACENE WITH THIOLS IN LIQUID AMMONIA

Y. Takikawa, T. Abe, R. Sato, 1980 .

Reaction of substituted benzaldehydes with sodium hydrogensulfide or sodium sulfide in liquid ammonia

K. Shimada, Y. Takikawa, R. Sato, 1985 .

Generation of 1,3-Chalcogenaza-1,3-butadienes by Thermal Cycloreversion of 2,4,6-Trisubstituted 6H-1,3,5-Oxachalcogenazines

K. Shimada, S. Aoyagi, Y. Takikawa, 2001 .

Synthesis of 1,2,4-dichalcogenazoles by the reaction of 6H-1,3,5-oxachalcogenazines with elemental chalcogen

K. Shimada, I. Rafiqul, S. Aoyagi, 2004 .

Novel Thiofomylation of Primary and Secondary Amines Using N-Aryl-1,2,3,4,5,7-Pentathiazocanes

K. Shimada, S. Aoyagi, Y. Takikawa, 2010 .

Synthesis and Oxidative Ring Contraction of 1,5,3,7-Dichalcogenadiazocanes. Novel Formation of 1,2,4-Diselenazolidines, 1,2,4-Ditellurazolidines, and 1,2,3,4,5,7-Pentathiazocanes

K. Shimada, Y. Shibata, S. Aoyagi, 2006 .

The Syntheses of Nitrobenzenethiols by the Use of Sodium Hydrosulf ide-Liquid Ammonia Solutiont

Y. Takikawa, S. Takizawa, 1972 .

Novel conversion of 6H-1,3,5-oxathiazine S-oxides into 3H-1,2,4-dithiazoles by treating with Lawesson's reagent

K. Shimada, I. Rafiqul, S. Aoyagi, 2004 .

Reaction of 4-Nitrobenzenesulfenamide with Liquid Ammonia

S. Ōae, Y. Takikawa, R. Sato, 1978 .

Novel Synthesis and Thermal Ring Fission of 7-Aryl-1,2,3,4,5,7-pentathiazocanes

K. Shimada, S. Aoyagi, Y. Takikawa, 2002 .

Regioselective monohalogenation of 3,3-disubstituted bornane-2-thiones via thione–dihalogen complexes

K. Shimada, S. Aoyagi, Y. Takikawa, 2001 .

Formation of Kinetically Stabilized Dithiiranes by Treating Thione S-Oxides Bearing a Bulky Substituent with Lawesson's Reagent.

K. Shimada, S. Aoyagi, Y. Takikawa, 1999 .

Efficient Synthesis of Selenocarbonyl Compounds by Treating Carbonyl Compounds with Bis(1,5-cyclooctanediylboryl) Selenide

K. Shimada, N. Saitǒ, S. Aoyagi, 1997 .

A Willgerodt–Kindler Type Selenation of Dihalomethane Derivatives, Chloroform, and Sodium Trichloroacetate by Treating with a Base, Elemental Selenium, and an Amine

Takashi Sasaki, K. Shimada, Y. Takikawa, 1996 .

Convenient Syntheses of N,N-Dialkylselenoamides and N,N,N',N'-Tetraalkylselenoureas.by Treating Terminal gem-Dihaloalkanes, Chloroform, or Sodium Trichloroacetate with a Base, Elemental Selenium, and Amines

Takashi Sasaki, K. Shimada, Y. Takikawa, 1994 .

Convenient Syntheses of N,N-Dialkylselenoamides and N,N,N′,N′- Tetraalkylselenoureas by Treating Terminal gem-Dihaloalkanes, Chloroform, or Sodium Trichloroacetate with a Base, Elemental Selenium, and Amines.

Takashi Sasaki, K. Shimada, Y. Takikawa, 1995 .

Novel generation of (α-ketovinyl)thioketenes as intermediates through tandem [2,3]/[3,3] sigmatropic rearrangement of alkynyl propargyl sulfoxides

K. Shimada, S. Aoyagi, Y. Takikawa, 2007 .

Novel generation of selenoaldehydes through stannic chloride-induced unsymmetrical C-Se bond cleavage of bis(N,N-dimethylcarbamoylseleno)methanes

K. Shimada, S. Aoyagi, Y. Takikawa, 2005 .

Generation of 1,3-Selenaza-1,3-butadienes by Thermal Cycloreversion of 2,4,6-Trisubstituted 6H-1,3,5-Oxaselenazines

K. Shimada, S. Aoyagi, Y. Takikawa, 1997 .

Stannic chloride-induced unsymmetrical CSe bond cleavage of bis(N,N-dimethylcarbamoylseleno)methanes: Novel generation of selenoaldehydes

K. Shimada, S. Aoyagi, Y. Takikawa, 2006 .

The Reactions of Aromatic Nitro Compounds with Sodium Hydrosulfide in Liquid Ammoniat

Y. Takikawa, S. Takizawa, 1972 .

Formation of a Sterically Crowded 1,6,6αλ4-Triselenapentalene and 4H-Selenopyran-4-selones Fused with Two Bornane Skeletons Through the Reaction of d-Camphor p-Toluenesulfonylhydrazone With a Base and Elemental Selenium

K. Shimada, S. Aoyagi, Y. Takikawa, 2020 .

SnCl4-Induced Unsymmetrical Cleavage of Bis(N,N-diethylcarbamoyltelluro)-arylmethanes: Generation of Tellurobenzaldehydes

K. Shimada, S. Ogawa, S. Aoyagi, 2013 .

Pummerer-type α-functionalization of arylseleninylacetates by treating with trimethylsilyl- or tri-n-butylstannyl-masked nucleophiles and trifluoroacetic anhydride or a Lewis acid

K. Shimada, S. Aoyagi, Y. Takikawa, 2000 .

Generation of a Selenoaldehyde, a Selenoketone, and Telluroaldehydes by [3,3] Sigmatropic Rearrangement of Allyl Alkenyl Selenides and Tellurides

K. Shimada, Y. Takikawa, Hidenori Nakamura, 1995 .

A Convenient Preparation of 2,4,6-Trisubstituted 1,3,5-Triselenanes by Treating Aldehydes or Their Acetals with 2,2,4,4,6,6-Hexamethyl-1,3,5-triselena-2,4,6-tristannacyclohexane in the Presence of BF3·OEt2 and AlCl3

K. Shimada, Y. Takikawa, S. Okuse, 1992 .

An Efficient Synthesis of Selenocarbonyl Compounds by the Treatment of Carbonyl Compounds with Bis[1,5-cyclooctanediylboryl] Selenide

K. Shimada, Y. Takikawa, Norikazu Jin, 1992 .

A Convenient Synthesis of Unsymmetrical Tellurides by a Sequential Reductive Cleavage of Bis(N,N-dimethylcarbamoyl) Ditelluride

K. Shimada, Y. Takikawa, Seiji Oikawa, 1992 .

Generation of 1,3-Chalcogenaza-1,3-butadienes by Thermal Cycloreversion of 2,4,6-Trisubstituted 6H-1,3,5-Oxachalcogenazines.

K. Shimada, S. Aoyagi, Y. Takikawa, 2010 .

Novel conversion of 6H‐1,3,5‐oxathiazine S‐oxides into 5‐membered heterocyclic compounds

K. Shimada, I. Rafiqul, S. Aoyagi, 2004 .

Novel generation and ring closure of 1,3-thiaza-1,3-butadiene S-oxides through thermal cycloreversion of 6H-1,3,5-oxathiazine s-oxides

K. Shimada, I. Rafiqul, S. Aoyagi, 2003 .

Conversion of 6H-1,3,5-Oxathiazine S-Oxides into 5H-1,2,4-Oxathiazoles via Novel Generation of 1,3-Thiaza-1,3-butadiene S-Oxides

K. Shimada, I. Rafiqul, S. Aoyagi, 2003 .

Reactions of 4-Nitrophenyl-Substituted-Phenyl-Sulfones with Elemental Sulfur in Liquid Ammonia: One-Pot Synthesis of Ammonium Arenethiosulfonates from Aromatic Nitro Sulfones

Y. Takikawa, M. Saito, R. Sato, 1981 .

Stannic Chloride Induced Unsymmetrical C—Se Bond Cleavage of Bis(N,N-dimethylcarbamoylseleno)methanes: Novel Generation of Selenoaldehydes.

K. Shimada, S. Aoyagi, Y. Takikawa, 2006 .

A Preparation of Alkyl or Alkenyl N,N-Dimethylchalcogenocarbamates and Their One-Step Conversion into Symmetrical Dialkyl or Dialkenyl Dichalcogenides

K. Shimada, Takahiro Suzuki, S. Aoyagi, 2005 .

Synthesis of Dialkenyl Dichalcogenides via Alkenechalcogenolate Ions Generated by Treating Ketone p-Toluenesulfonylhydrazones with a Base and Elemental Chalcogen.

K. Shimada, S. Aoyagi, Y. Takikawa, 1998 .

A Novel Synthesis of Primary Selenoamides from Nitriles by the Treatment of Bis(trimethylsilyl) Selenide and BF3·OEt2

K. Shimada, Y. Takeishi, Y. Takikawa, 1990 .

Synthesis of Sterically-Crowded Olefins, gem-Dihaloalkenes, Butatrienes, and Thioketenes through the Reaction of Substituted Bornane-2-thiones or Bornane-2-selones with Conventional Carbenes or Metal Carbenoids

K. Shimada, J. Sasaki, S. Aoyagi, 2013, Natural product communications.

Synthesis of 1,2,4-Ditellurazolidines by Oxidative Ring Contraction of 2H,6H-Tetrahydro-1,5,3,7-ditelluradiazocines.

K. Shimada, Y. Shibata, S. Aoyagi, 2000 .

REACTION OF 4-CHLORONITROBENZENE WITH ELEMENTAL SULFUR IN LIQUID AMMONIA

S. Ōae, Y. Takikawa, R. Sato, 1979 .

Generation of allenylthioketene S,S-dioxides through [3,3] sigmatropic rearrangement of alkynyl propargyl sulfones

K. Shimada, Makoto Koyanagi, S. Aoyagi, 2007 .

Isolation and Characterization of an Allenylthioketene and 4-Methylenecyclobutenethiones Generated by Thermal Reaction of Alkynyl Propargyl Sulfides

K. Shimada, S. Aoyagi, Y. Takikawa, 2006 .

A Pummerer-Type Novel Ring Fission of 2-Methylsulfinyl-5,6-dihydro-4H-1,3,4-thiadiazine Derivatives: A Homologation of Aldehydes and Ketones

K. Shimada, Kazuya Inoue, Y. Takikawa, 1996 .

A Homologation of Aldehydes and Ketones via the Formation and the Subsequent Pummerer-type Ring Fission of 2-Methylsulfinyl-5,6-dihydro-4H-1,3,4-thiadiazine Derivatives

K. Shimada, Kazuya Inoue, Y. Takikawa, 1995 .

Synthetic applications of 3H-1,2,4-dithiazoles: Structure and reactivity studies

M. Islam, K. Lim, Y. Takikawa, 2012 .

A Novel One-step Synthesis of Quinoline-2(1H)-thiones and Selones by Treating 3-Aryl-3-(2-aminophenyl)-1-propyn-3-ols with a Base and Elemental Sulfur or Selenium

K. Shimada, K. Noro, T. Korenaga, 2015, Natural Product Communications.

A Willgerodt‐Kindler Type Selenation of Dihalomethane Derivatives, Chloroform, and Sodium Trichloroacetate by Treating with a Base, Elemental Selenium, and an Amine.

Takashi Sasaki, K. Shimada, Y. Takikawa, 1996 .

Effects of molecular structure of aliphatic diols and polyalkylene glycol as lubricants on the wear of aluminum

S. Mori, Y. Takikawa, S. Igari, 2000 .

Synthesis, Characterization, and Reactivity of Novel 6H-1,3,5-Oxathiazine S,S-Dioxides

M. Islam, K. Lim, Y. Takikawa, 2014 .

REACTION OF α-CHLOROTOLUENE WITH ELEMENTAL SULFUR IN LIQUID AMMONIA

K. Kakuta, S. Ōae, Y. Takikawa, 1979 .

A Novel Method for the Generation of Thial S-Sulfides from 2,4,6-Trisubstituted 5,6-Dihydro-1,3,5-dithiazines

K. Shimada, Y. Takikawa, T. Makabe, 1988 .

Novel Generation, Characterization, and Trapping of 2-Methylene-3-cyclobutene-1-selones

S. Akimoto, K. Shimada, Y. Takikawa, 1994 .

Regioselective Monohalogenation of 3,3‐Disubstituted Bornane‐2‐thiones via Thione—Dihalogen Complexes.

K. Shimada, S. Aoyagi, Y. Takikawa, 2002 .

Oxidation of sterically-crowded selones using chloramine-T: generation and skeletal rearrangement of selone Se -imides

K. Shimada, S. Aoyagi, Y. Takikawa, 2000 .

Convenient Preparations of 3,5-Disubstituted 1,2,4-Thiadiazoles by Oxidative Dimerization of Thioamides

K. Shimada, Shinichi Sato, Y. Takikawa, 1985 .

Convenient Synthesis of Aromatic Thiosulfonates from Aromatic Sulfinates with Elemental Sulfur in Amines

Y. Takikawa, R. Sato, S. Takizawa, 1980 .

Convenient Synthesis of 4-Methylenecyclobutenones and Their Synthetic Utility as Allenylketene Precursors

K. Shimada, S. Aoyagi, Y. Takikawa, 2007 .

A CONVENIENT PREPARATION OF Z-STYRYL, Z,Z- AND E,Z-DISTYRYL SULFIDES IN LIQUID AMMONIA

K. Shimada, Y. Takikawa, S. Takizawa, 1983 .