Efficient coupling of tertiary alkyl halides with dialkylzinc and titanium compounds
作者:Manfred T. Reetz、Bernd Wenderoth、Roland Peter、Rainer Steinbach、J�rgen Westermann
DOI:10.1039/c39800001202
日期:——
Dialkylzinccompounds react with tertiaryalkylhalides to afford the corresponding coupling products containing a quaternary carbon atom, thereby making geminal dialkylation of ketones or hydroalkylation of olefins possible.
A New Method for the Synthesis of<i>tert</i>-Alkyl Chlorides from<i>tert</i>-Alcohols
作者:David Crich、Simon M. Fortt
DOI:10.1055/s-1987-27832
日期:——
Tert-Alkyl chlorides 5 are prepared in good yield from the corresponding alcohols 1 in a facile two step synthesis. The method involves treatment of the corresponding crude oxalyl monochloride alkyl ester 2 with N-hydroxy-pyridine-2-thione sodium salt 3 in tetrachloromethane at reflux to give the bright yellow N-(alkoxyoxalyloxy) pyridine-2-thiones 4 which undergo decomposition to the chlorides 5 in good yield. The reaction is conveniently monitored by the loss of colour from the mixed anhydride.