Stereospecific Rearrangement of Optically Active Tertiary Allylic Epoxides To Give Optically Active Quaternary Aldehydes: Synthesis of .alpha.-Alkyl Amino Aldehydes and Acids
作者:Michael E. Jung、Derin C. D'Amico
DOI:10.1021/ja00133a011
日期:1995.7
under conditions using zinc metal with triphenylphosphine and carbon tetrabromide gave not the expected olefin 3, but rather the aldehyde 4 in good yield (60%). Presumably, the reaction proceeds via the intermediacy of the alkene 3, but the zinc bromide formed in the reaction is a strong enough Lewis acid to cause the rearrangement of 3 into 4, by coordination with the epoxide, assistance in the breakage