Formamide Catalysis Facilitates the Transformation of Aldehydes into Geminal Dichlorides
作者:Peter Helmut Huy
DOI:10.1055/s-0037-1611798
日期:2019.6
Haack reagent type intermediate is likely to be essential for this organocatalytic nucleophilic substitution reaction. Herein, a novel method for the transformation of aldehydes into geminal dichlorides based on phthaloyl chloride as reagent and N-formylpyrrolidine as Lewis base catalyst is disclosed. Given the mild reaction conditions, the current protocol is distinguished by high levels of functional
Formation of 1-chlorobenzocyclobutene, anthracene or benzofuran by flash vacuum pyrolysis
作者:Amjad Hussain、John Parrick
DOI:10.1016/s0040-4039(00)81477-x
日期:1983.1
pyrolysis of o-substituted benzylidene chlorides is shown to be a useful route to 1-chloro-benzocyclobutene, anthracene or benzofurans; evidence is given for a carbene intermediate in the pyrolysis of o-methoxybenzylidene chloride.
Synthesis of α,α-dichloroalcohols, α-hydroxyketones and 1-chloro-1-arylalkylene oxides via protonation of acyllithium reagents
作者:George W Kabalka、Nan-Sheng Li、Su Yu
DOI:10.1016/s0022-328x(98)00797-9
日期:1999.1
The protonation of acyllithiumreagents generated in situ from alkyllithiums and carbon monoxide in the presence of dichloromethane or dichloroarylmethanes produces α,α-dichloroalcohols in high yields. The reaction produces α-hydroxy-ketones in high yields when the aryl group of dichloroarylmethane contains a strong electron-donating group at the ortho or para position. The transformation of α,α-dichloro-α-aryl