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Synthesis of Anti--Substituted , 详细信息    查看全文
文摘
Anti--substituted ,-unsaturated amino acids have been synthesized via a novel design of the Eschenmoser-Claisen rearrangement. Therearrangement gives good isolated yields and excellent diastereoselectivity due to (Z)-N,O-ketene acetal formation and the pseudochairlikeconformations of the reaction intermediates. Upon reductive hydrolysis, important novel amino acids and amino alcohols were synthesizedfor the first time via this methodology.

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