Iron hydride complexes of the general formula P2Fe(NO)CO)H are highly active catalysts for the hydrosilylation of aldehydes or ketones and phosphine oxides. Depending on the solvent, the in situ reduction of the phosphine oxide can be faster than the corresponding hydrosilylation of a carbonyl group. This unusual activity was used within the context of catalytic Wittig olefination.
Cu-catalyzed debrominative cyanation of gem-dibromoolefins: a facile access to α,β-unsaturated nitriles
作者:Brij Bhushan Ahuja、Arumugam Sudalai
DOI:10.1039/c5ob00394f
日期:——
of α,β-unsaturated nitriles from easily accessible gem-dibromoolefins has been developed. The method utilized inexpensive reagents such as Cu2O as a catalyst, L-proline as a ligand and NaCN as a cyanide source to afford α,β-unsaturated nitriles in high yields (62–86%). A deuterium exchange study has shown that one of the bromide atoms of gem-dibromoolefins exchanges with cyanide while the other with
A Short and Versatile Synthesis of 3-Substituted 2-Aminoquinolines
作者:Reinaldo S. Compagnone、Alírica I. Suárez、Jorge L. Zambrano、Ivette C. Piña、José N. Domínguez
DOI:10.1080/00397919708006102
日期:1997.5
Abstract A short and versatile synthesis of a series of 3-substituted -2-aminoquinolines was accomplished in good yields startingfrom 2-nitrobenzaldehide. Organic phosphonates were used as key synthetic intermediates and in some cases aminoacids as readily available startingmaterials. The finals two key steps of the sequence involving a reduction and ring closure that led to the 2-aminoquinoline
Hazard,R.; Tallec,A., Bulletin de la Societe Chimique de France, 1974, p. 121 - 125
作者:Hazard,R.、Tallec,A.
DOI:——
日期:——
Wittig Olefination Using Phosphonium Tetraphenylborate in the Absence of Additional Base
作者:Wenhua Huang、Shuang-Hong Zhao、Guang-Ping Dong
DOI:10.1080/10426507.2014.902827
日期:2014.12.2
The thermal decomposition of (substituted methyl)triphenylphosphonium tetraphenylborates, which can also be generated in situ from the corresponding phosphonium halide and NaBPh4, with an aldehyde affords olefins in 22-100% yields. This Wittig olefination does not need use additional base to form phosphorus ylide, and is highly tolerant of benzoic acid.