Transacetoacetylation with tert-butyl acetoacetate: synthetic applications
摘要:
Reaction of various nucleophiles with tert-butyl acetoacetate (t-BAA, 1a) is shown to be a convenient method for the preparation of a wide variety of acetoacetic acid derivatives. This material can be used to prepare acetoacetates and acetoacetamides from a wide variety of alcohols and amines. Reaction of 1a with an unhindered primary amine such as n-heptylamine under standard conditions gives unwanted byproducts due to the formation of the enamines 24 and 25. Formation of these byproducts can be minimized by dilution and/or altering the mode of addition.
WITZEMAN, J. STEWART;NOTTINGHAM, W. DELL, J. ORG. CHEM., 56,(1991) N, C. 1713-1718
作者:WITZEMAN, J. STEWART、NOTTINGHAM, W. DELL
DOI:——
日期:——
US4332941A
申请人:——
公开号:US4332941A
公开(公告)日:1982-06-01
Transacetoacetylation with tert-butyl acetoacetate: synthetic applications
作者:J. Stewart Witzeman、W. Dell Nottingham
DOI:10.1021/jo00005a013
日期:1991.3
Reaction of various nucleophiles with tert-butyl acetoacetate (t-BAA, 1a) is shown to be a convenient method for the preparation of a wide variety of acetoacetic acid derivatives. This material can be used to prepare acetoacetates and acetoacetamides from a wide variety of alcohols and amines. Reaction of 1a with an unhindered primary amine such as n-heptylamine under standard conditions gives unwanted byproducts due to the formation of the enamines 24 and 25. Formation of these byproducts can be minimized by dilution and/or altering the mode of addition.