An Efficient Synthesis of Optically Active 4-Benzyloxy-3-hydoroxy-1-butyne and Its Cross-Coupling Reaction
摘要:
An efficient procedure for the synthesis of optically active 4-benzyloxy-3-hydroxy-1-butyne (12: R = H) has been established starting with optically active tartrate ester. Cross-coupling reaction of the resulted acetylene (12: R = H) with some aromatic halides (13a approximately h) and transformation of the arylacetylenes (14a approximate h), thus obtained, into the allylic amine derivatives (17a approximate h) have also been examined via the allylic alcohol intermediates (15 a approximately h) by sequential stereoselective reduction and [3,3] sigmatropic rearrangement.
An efficient procedure for the synthesis of optically active 4-benzyloxy-3-hydroxy-1-butyne (12: R = H) has been established starting with optically active tartrate ester. Cross-coupling reaction of the resulted acetylene (12: R = H) with some aromatic halides (13a approximately h) and transformation of the arylacetylenes (14a approximate h), thus obtained, into the allylic amine derivatives (17a approximate h) have also been examined via the allylic alcohol intermediates (15 a approximately h) by sequential stereoselective reduction and [3,3] sigmatropic rearrangement.
Alkylative elimination of α,β-epoxy tosylhydrazones
作者:S. Chandrasekhar、Mohamed Takhi、J.S. Yadav
DOI:10.1016/0040-4039(94)02237-6
日期:1995.1
Optically pure allyl alcohols have been prepared from tosylhydrazones derived from chiral epoxy aldehydes by alkylativeelimination utilizing alkyl magnesium reagents.