Preparation of enantiomerically pure (1S,2S)-1-aminocyclopropanephosphonic acid from methylcyclopropanone acetal via spirophosphonate intermediates
摘要:
An easy and efficient one-pot reaction from readily available methylcyclopropanone acetal (2S)-4b gave the spirophosphonates 8a-b with excellent diastereoselectivity. These phosphonates, after catalytic hydrogenolysis and hydrolysis, furnished the enantiomerically pure (1S,2S)-1-amino-2-methylcyclopropanephosphonic acid 3b (analogue of (1R,2S)-allo-norcoronamic acid). (C) 2000 Elsevier Science Ltd. All rights reserved.
Synthesis of (1S,2S)- and (1R,2R)-1-amino-2-methylcyclopropane-phosphonic acids from racemic methylcyclopropanone acetal
作者:Nicolas Tesson、Benoist Dorigneux、Antoine Fadel
DOI:10.1016/s0957-4166(02)00609-2
日期:2002.10
An efficient and easy one-pot reaction from readily available racemic alkylcyclopropanone acetals gave the corresponding aminophosphonates with excellent diastereoselectivity. After catalytic hydrogenolysis, and hydrolysis, these trans-phosphonates led to enantiopure (+)-1-amino-2-methylcyclopropanephosphonic acid and its antipode (analogues of allo-norcoronamic acid).