Chelation controlled 1,3-dipolar cycloaddition of 5,6-Dihydro-5-phenyl-1,4-oxazin-2-one N-oxide with allyl alcohols: A short-step synthesis of clavalanine intermediate
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M. Sakamoto | O. Tamura | Takahiro Kuroki | Y. Morita | J. Yoshino | Yuta Sakai | J. Takizawa | K. Gotanda | N. Mita