A short synthesis of (±)-tecomanine via a Pauson–Khand-based route
摘要:
The N-carboethoxy precursor to (+/-)-tecomanine has been prepared in 11 steps from 2-methyl-l-buten-3-yne. The key step, Pauson-Khand cyclization of a methylated 5-aza-6-nonen-1-yne succeeds, but only in low yield, a consequence of the dialkyl substitution about the azaenyne framework. Nevertheless, the overall sequence to that point is one of the more efficient to be described. (C) 2003 Elsevier Science Ltd. All rights reserved.
A short synthesis of (±)-tecomanine via a Pauson–Khand-based route
摘要:
The N-carboethoxy precursor to (+/-)-tecomanine has been prepared in 11 steps from 2-methyl-l-buten-3-yne. The key step, Pauson-Khand cyclization of a methylated 5-aza-6-nonen-1-yne succeeds, but only in low yield, a consequence of the dialkyl substitution about the azaenyne framework. Nevertheless, the overall sequence to that point is one of the more efficient to be described. (C) 2003 Elsevier Science Ltd. All rights reserved.
A short synthesis of (±)-tecomanine via a Pauson–Khand-based route
作者:Denise A. Ockey、Mark A. Lewis、Neil E. Schore
DOI:10.1016/s0040-4020(03)00779-8
日期:2003.7
The N-carboethoxy precursor to (+/-)-tecomanine has been prepared in 11 steps from 2-methyl-l-buten-3-yne. The key step, Pauson-Khand cyclization of a methylated 5-aza-6-nonen-1-yne succeeds, but only in low yield, a consequence of the dialkyl substitution about the azaenyne framework. Nevertheless, the overall sequence to that point is one of the more efficient to be described. (C) 2003 Elsevier Science Ltd. All rights reserved.