Exclusive γ-regio functionalization of crotonaldehyde using γ-trimethylsilyl crotonaldimine. Application to the one pot synthesis of conjugated dienals
作者:Moncef Bellassoued、Malika Salemkour
DOI:10.1016/0040-4020(96)00165-2
日期:1996.3
Cesium fluoride mediated reaction of γ-trimethylsilyl N-tert-butyl crotonaldimine 9 with a wide range of aldehydes takes place in DMSO at room temperature and affords exclusiveγ-regiofunctionalized products. Heating (rt to 100°C) the δ-silyloxy imines 11 thus obtained leads, after very mild hydrolysis of the tert-butylimine function, to the conjugateddienals 14 in good yields and with excellent
Regio- and diastereoselective boron-mediated aldol reactions of chiral α,β,γ,δ-unsaturated N-acyloxazolidinones
作者:James M Takacs、Mohamad R Jaber、Benjamin J Swanson、Steven J Mehrman
DOI:10.1016/s0957-4166(98)00459-5
日期:1998.12
Chiral N-acyloxazolidinones derived from conjugated dienoic acids undergo boron-mediated aldol condensation in good yield and with high regio- and diastereoselectivity to provide a convenient method for introducing a 1,3-diene subunit. The condensation of a homologous triene derivative is also described.
Synthesis of γ,γ-Disubstituted Butenolides through a Doubly Vinylogous Organocatalytic Cycloaddition
作者:Anna Skrzyńska、Piotr Drelich、Sebastian Frankowski、Łukasz Albrecht
DOI:10.1002/chem.201804650
日期:2018.11.7
organocatalytic approach to γ,γ‐disubstituted butenolides is described. It is based on a fully site‐selective functionalization of 5‐alkylidenefuran‐2(5H)‐ones via trienamine‐mediated [4+2]‐cycloaddition with α,β,γ,δ‐diunsaturated aldehydes. The developed methodology proceeds with excellent stereocontrol and constitutes a unique example of trienamine chemistry with vinylogous dienophiles. Importantly,
Use of volatile compounds to modulate the perception of musk
申请人:Firmenich SA
公开号:US11530366B2
公开(公告)日:2022-12-20
The various aspects presented herein relate to the perfumery industry. More particularly, the various aspects presented herein relate to compositions and/or ingredients that increase a subjects perception of musk compounds, methods for intensifying a subjects perception of musk compounds, as well as to the perfumed articles or perfuming compositions comprising as an active ingredient, a compound of Formula (I).