Selective Homologation of Ketones and Aldehydes with Diazoalkanes Promoted by Organoaluminum Reagents
作者:Keiji Maruoka、Amel B. Concepcion、Hisashi Yamamoto
DOI:10.1055/s-1994-25682
日期:——
Organoaluminum-promoted single homologation or ring expansion of ketones and aldehydes with diazoalkanes has been described, and among various organoaluminum reagents, exceptionally bulky methylaluminum bis(2,6-di-tert-butyl-4-methylphenoxide) (MAD) is found to be highly effective for the selective homologation of various ketones and aldehydes.
Conformational analysis. LXII. solvolysis and deamination studies of the 5-t-butylcylooctyl system.
作者:N.L. Allinger、W. Szkrybalo
DOI:10.1016/s0040-4020(01)98666-1
日期:1968.1
The solvolyses of cis- and trans-5-t-butylcyclooctyl tosylates in acetic acid have been studied, and the rates and products are reported. The fast rate and rearranged product from the cis isomer are interpreted in terms of neighboring group participation by hydride. Improved syntheses of the compounds are given. Deamination reactions of the corresponding amines were also studied, and a product study