Synthesis of Alkenyl-Substituted Allenecarboxylates
作者:Robert Werner Lang、Elisabeth Kohl-Mines、Hans-J�rgen Hansen
DOI:10.1002/hlca.19850680820
日期:1985.12.18
The Wittig olefination of decanoyl chloride by using the phosphonium salt 1 in the presence of two equivalents of Et3N represents a one-step synthesis of the racemic form of the naturally occurring pheromone (–)-2 which contains an alkenyl-substituted allenic moiety (ef. Scheme 1). It is also shown, that unsaturated acyl chlorides which contain at least one γ-H-atom undergo the Wittig reaction with
KOHI-MINES, E.;HANSEN, H. -J., HELV. CHIM. ACTA, 1985, 68, N 8, 2244-2248
作者:KOHI-MINES, E.、HANSEN, H. -J.
DOI:——
日期:——
LANG, R. W.;KOHL-MINES, E.;HANSEN, H. -J., HELV. CHIM. ACTA, 1985, 68, N 8, 2249-2253
作者:LANG, R. W.、KOHL-MINES, E.、HANSEN, H. -J.
DOI:——
日期:——
A Short Synthesis of Allene- and [3] Cumulenecarboxylates
作者:Elisabeth Kohl-Mines、Hans-J�rgen Hansen
DOI:10.1002/hlca.19850680819
日期:1985.12.18
[(alkoxycarbonyl)methylidene]phosphoranes to yield the corresponding esters of allene carboxylic acids (ef. Scheme 1 and Table 1). This procedure can also be applied to cinnamic acids which form [3]cumulenecarboxylates in low yield (Table 3). Under the same conditions 4-methyl-2-pentynoic acid can be transformed into (2E)-4-chloro-2,6-dimethylhepta-2,4,5-trienoate (Scheme 4).
Environmentally Friendly Synthesis of Highly Substituted Phenols Using Enallenoates and Grignard Reagents
作者:Bolin Wang、Mingzhe Ren、Nasir Iqbal、Xin Mu、Bin Yang
DOI:10.1021/acs.orglett.4c00759
日期:2024.4.26
friendly methodology for selectively synthesizing highly substituted phenols using readily available enallenoates and Grignardreagents. This method consistently yields good to excellent results across over 60 examples, demonstrating the substrate scope and the exploration of phenol product derivatization, further extending the method’s utility.