Synthesis of Cyclobutanones<i>via</i>Gold-Catalyzed Oxidative Rearrangement of Homopropargylic Ethers
作者:Mei Xu、Tian-Tian Ren、Kai-Bing Wang、Chuan-Ying Li
DOI:10.1002/adsc.201300227
日期:2013.9.16
of a gold catalyst and 8‐ethylquinoline N‐oxide, a homopropargylic ether bearing an electron‐rich aromatic ring or an alkenyl group can be converted into a cis‐cyclobutanone smoothly. An α‐oxo gold carbenoid is proved to be the key intermediate, and it can evolve into an oxonium ylide.
REACTION OF PROPARGYL BROMIDE AND TRIMETHYLSILYLPROPARGYL IODIDE WITH METALLIC TIN, ALUMINUM, AND ALDEHYDES OR KETONES. SELECTIVE SYNTHESIS OF β-ACETYLENE, β-TRIMETHYLSILYLACETYLENE, AND α-TRIMETHYLSILYLALLENE ALCOHOLS
β-Acetylenic and α-allenic alcohols were synthesized selectively by the reaction of aldehydes and ketones with organotin compounds prepared by treatment of propargyl bromide or trimethylsilylpropargyl iodide with metallic tin and aluminum in a suitable solvent.
[EN] PROCESS FOR MAKING A CONJUGATED DIENE FROM AN ALLYL ALCOHOL<br/>[FR] PROCÉDÉ DE FABRICATION D'UN DIÈNE CONJUGUÉ À PARTIR D'UN ALCOOL D'ALLYLE
申请人:GIVAUDAN SA
公开号:WO2021255052A1
公开(公告)日:2021-12-23
An in-situ method for making a conjugated diene from an allyl alcohol comprising the conversion of the allyl alcohol to an allyl carbonate, allyl ester or allyl formate with concomitant or subsequent conversion of the allyl carbonate, allyl ester or allyl formate to the conjugated diene; the products obtained by said method, and the uses of said products.