Highly Enantioselective Synthesis of β-Aminophosphinates with Two Stereogenic Atoms and Their Conversion into Optically Pure Ethyl β-Amino-<i>H</i>-phosphinates
作者:Dehui Zhang、Chengye Yuan
DOI:10.1002/chem.200802248
日期:2009.4.14
β‐Amino acid analogues: The nucleophilic addition of ethyl (diethoxyethyl)methylphosphinate to a variety of (S)‐(tert‐butanesulfinyl)imines leads to the isolation of two enantioenriched β‐aminophosphinates (>95 % ee; see scheme). Subsequent removal of the protecting groups through pivotal metal‐catalyzed thiophenolysis leads to optically pure ethylβ‐amino‐H‐phosphinates.
β-氨基酸类似物:(二乙氧基乙基)甲基次膦酸乙酯向各种(S)-(叔丁烷亚磺酰基)亚胺的亲核加成导致分离出两个对映体富集的β-氨基次膦酸酯(> 95% ee ;参见方案)。通过枢转随后除去保护基团的金属催化thiophenolysis导致光学纯乙基β氨基ħ -phosphinates。