A versatile method for the preparation of allenic alcohols
作者:Gary E. Keck、R.R. Webb
DOI:10.1016/s0040-4039(00)87530-9
日期:1982.1
A convenient three step procedure to a variety of allenicalcohols is described, which relies on a highly unusual partitioning between two reaction pathways depending on the mode of addition of a reagent.
General CuBr<sub>2</sub>-catalyzed highly enantioselective approach for optically active allenols from terminal alkynols
作者:Xin Huang、Tao Cao、Yulin Han、Xingguo Jiang、Weilong Lin、Jiasheng Zhang、Shengming Ma
DOI:10.1039/c5cc00697j
日期:——
A copper(ii) bromide-catalyzed highly enantioselective direct synthesis of 1,3-disubstituted allenols from commercially available aldehydes, terminal alkynols and (R)- or (S)-α,α-diphenylprolinol has been developed.
Copper (I) Iodide-Catalyzed One-Step Preparation of Functionalized Allenes from Terminal Alkynes: Amine Effect
作者:Jinqiang Kuang、Hongwen Luo、Shengming Ma
DOI:10.1002/adsc.201100772
日期:2012.3.16
An efficient one‐step synthesis of functionalizedallenesfrom readily available functionalizedterminal alkynes and aldehydes by applying the effect of a dialkylamine has been developed. The protocol is catalyzed by copper(I) iodide and the dialkylamine is believed to play a very important role in the transformation.
Studies on Electrophilic Interaction of 2,3-Allenols with Electrophilic Halogen Reagents: Selective Synthesis of 2,5-Dihydrofurans, 3-Halo-3-alkenals, or 2-Halo-2-alkenyl Ketones
作者:Jing Li、Chunling Fu、Guofei Chen、Guobi Chai、Shengming Ma
DOI:10.1002/adsc.200800088
日期:2008.6.9
iodine (I2) afforded 2,5-dihydrofurans while that of readily available 1-aryl or 1-methyl substituted 2,3-allenols with bromine (Br2), N-bromosuccinimide (NBS), I2 or N-iodosuccinimide (NIS) formed the not easily available but synthetically useful 3-halo-3-alkenals and 2-halo-2-alkenyl ketones with good selectivity and yields via a sequential electrophilic interaction of X+ with the allene moiety, 1,2-aryl
The present invention relates to the field of perfumery. More particularly, it concerns a composition of matter comprising a compound of formula (I) as defined below wherein the weight ratio of the cis-diastereoisomers to the trans-diastereoisomers is comprised in the range between 90:10 and 99.5:0.5 and comprising at least 10% w/w of cis-(1S,2R) diastereoisomer. Said composition of matter is a useful perfumery ingredient, and therefore the present invention comprises the invention composition of matter as part of a perfuming composition or of a perfuming consumer product.