Ni-Catalyzed regio- and stereoselective addition of arylboronic acids to terminal alkynes with a directing group tether
作者:Madala Hari Babu、Gadi Ranjith Kumar、Ruchir Kant、Maddi Sridhar Reddy
DOI:10.1039/c6cc10256e
日期:——
Addition of arylboronic acids to directing group tethered acetylenes in a regio and stereoselective manner using an inexpensive catalytic system is achieved for the first time to access highly sought after allyl/homoallyl alcohol/amine units.
Synthesis of 2,5-dihydrofurans via alkylidene carbene insertion reactions
作者:Louise F. Walker、Ahmed Bourghida、Stephen Connolly、Martin Wills
DOI:10.1039/b111097g
日期:2002.3.25
The insertion reaction of alkylidene carbenes is demonstrated to be an effective method for the synthesis of 2,5-dihydrofuran ring systems. The best results have been obtained on substrates containing electron-withdrawing substituents, which appear less prone to the competing rearrangement reaction. This insight has led to the development of a new method for the synthesis of the core structure of the squalestatin–zaragozic acid natural products.
Convenient preparation of bromoalkynes from primary alkynes and PPh3 / CBr4
作者:A Wagner、M.P Heitz、C Mioskowski
DOI:10.1016/s0040-4039(00)94715-4
日期:1990.1
1-Bromo-1-alkynes are prepared in high yields under very mild conditions by treatment of primary alkynes with PPh3/CBr4.
通过用PPh3 / CBr 4处理伯炔,可以在非常温和的条件下高产率地制备1-Bromo-1-炔。
Rearrangement of lithioalkynyltriorganoborates derived from propargylic acetals : a one pot synthesis of homopropargylic alcohols
作者:Daniel Carrié、Bertrand Carboni、Michel Vaultier
DOI:10.1016/0040-4039(95)01756-8
日期:1995.11
ales generated from the corresponding propargylic acetals rearrange in the presence of borontrichloride thus opening an efficient and convenient route to a variety of homopropargylic alcohols free of the corresponding allenic isomers. Unexpectedly, the parent derivative leads exclusively to the allenic alcohol.