Rh(II)-catalyzed asymmetric cyclopropenation of propargyl derivatives; synthesis of cyclopropene- and cis-cyclopropane-amino acids
摘要:
The [Rh-2(2S)-mepy}(4)]-catalyzed cyclopropenation of propargylamines carrying two carboxyl or sulfonyl protecting groups with ethyl diazoacetate proceeds in high yield and with enantioselectivities in the range of 90->97% ee. Selective deprotection of the TEOC-derivative afforded ethyl 2-aminomethylcycloprop-2-ene-1-carboxylate which was converted to several analogs of gamma-aminobutyric acid (GABA) containing the cyclopropene or cyclopropane ring. (C) 1998 Elsevier Science Ltd. All rights reserved.
Rh(II)-catalyzed asymmetric cyclopropenation of propargyl derivatives; synthesis of cyclopropene- and cis-cyclopropane-amino acids
摘要:
The [Rh-2(2S)-mepy}(4)]-catalyzed cyclopropenation of propargylamines carrying two carboxyl or sulfonyl protecting groups with ethyl diazoacetate proceeds in high yield and with enantioselectivities in the range of 90->97% ee. Selective deprotection of the TEOC-derivative afforded ethyl 2-aminomethylcycloprop-2-ene-1-carboxylate which was converted to several analogs of gamma-aminobutyric acid (GABA) containing the cyclopropene or cyclopropane ring. (C) 1998 Elsevier Science Ltd. All rights reserved.
Rh(II)-catalyzed asymmetric cyclopropenation of propargyl derivatives; synthesis of cyclopropene- and cis-cyclopropane-amino acids
作者:Paul Müller、Hassan Imogaı̈
DOI:10.1016/s0957-4166(98)00469-8
日期:1998.12
The [Rh-2(2S)-mepy}(4)]-catalyzed cyclopropenation of propargylamines carrying two carboxyl or sulfonyl protecting groups with ethyl diazoacetate proceeds in high yield and with enantioselectivities in the range of 90->97% ee. Selective deprotection of the TEOC-derivative afforded ethyl 2-aminomethylcycloprop-2-ene-1-carboxylate which was converted to several analogs of gamma-aminobutyric acid (GABA) containing the cyclopropene or cyclopropane ring. (C) 1998 Elsevier Science Ltd. All rights reserved.