Highly Enantioselective Nickel-Catalyzed Hydrocyanation of Disubstituted Methylenecyclopropanes Enabled by TADDOL-based Diphosphite Ligands
作者:Rongrong Yu、Xianjie Fang
DOI:10.1021/acs.orglett.9b04374
日期:2020.1.17
A vast range of novel TADDOL-based diphosphite ligands were first synthesized and applied in the nickel-catalyzed asymmetric hydrocyanation of disubstituted methylenecyclopropanes. By employing these new catalysts, the conversion of diverse methylenecyclopropanes into their corresponding allylic nitriles was first enabled, in good yield with excellent enantioselectivities.
strategy has been developed for regioselective imino functionalizations of alkenes via the formation of an EDA complex. This photo-induced protocol facilitates the construction of structurally diverse β-imino sulfones and vinyl sulfones in moderate to high yields. Mechanistic studies reveal that the reaction is initiated with an intermolecular chargetransfer between oximes and sulfinates, followed by fragmentation
STAFFORD, JEFFREY A.;, MCMURRY JOHN E., TETRAHEDRON LETT., 29,(1988) N 21, C. 2531-2534
作者:STAFFORD, JEFFREY A.、, MCMURRY JOHN E.
DOI:——
日期:——
A Formal [4 + 2] Dimerization of 9-Cyclopropylidene-9H-fluorene
作者:Gerald Dyker、Gerhard Hillebrand、Ludger Ernst、Ina Dix、Peter G. Jones
DOI:10.1002/jlac.199619961110
日期:1996.11
The methylenecyclopropanes 7 and 8, with aryl substituents fixed in a coplanar conformation, show an extraordinary readiness to dimerize with formation of 10 and 11, respectively.
具有固定在共面构象中的芳基取代基的亚甲基环丙烷7和8分别显示形成10和11时非常易于二聚。
An efficient method for the preparation of alkylidenecyclopropanes