An Asymmetric Synthesis of Optically Pure α,α-Disubstituted Amino Aldehydes, α,α-Disubstituted Amino Acids, and Sterically Demanding Dipeptides
作者:Steve Wenglowsky、Louis S. Hegedus
DOI:10.1021/ja9823518
日期:1998.12.1
Optically pure α-methyl-α-alkyl amino aldehydes were efficiently synthesized from the cyclohexylimine of propanal bearing an α-4(R),5(S)-diphenyl-2-oxazolidinone by asymmetric alkylation of the imine anion. α-Methylphenylalanine and α-methylleucine were synthesized in two steps from the corresponding amino aldehydes. Utilizing an oxaziridine rearrangement, amino aldehydes were converted to dipeptides
通过亚胺阴离子的不对称烷基化,从带有 α-4(R),5(S)-二苯基-2-恶唑烷酮的丙醛的环己亚胺有效地合成了光学纯的 α-甲基-α-烷基氨基醛。α-甲基苯丙氨酸和α-甲基亮氨酸由相应的氨基醛分两步合成。利用恶氮丙啶重排,氨基醛转化为二肽,其中氨基和羧基组分均被α,α-二取代。