Nucleophilic Substitution Reactions of Alkyl Halides by Using New Polymer-Supported Reagents Containing Hemin
作者:Kiyoshi Saito、Kaoru Harada
DOI:10.1246/bcsj.62.2562
日期:1989.8
hemin, divinylbenzene, and 2-methyl-5-vinylpyridine was synthesized by suspension copolymerization. Substitution reactions of primary, secondary, and tertiary alkylhalides with the hemin copolymer combined with cyanide, azide, and thiocyanate ions were given satisfactory yields. This reaction mechanism was revealed to be a SNi type on the basis of stereochemical study. The hemin copolymer was not only
Ultrasound-Assisted Nucleophilic Substitution Reaction of<i>t</i>-Alkyl Halides with Zinc and Titanium Thiocyanate
作者:B. K. Bettadaiah、K. N. Gurudutt、P. Srinivas
DOI:10.1081/scc-120021510
日期:2003.1.7
Abstract Ultrasound promotes nucleophilicsubstitution of t-alkyl halides with ambident thiocyanate nucleophile, in the form of its zinc or titanium thiocyanate, under mild conditions to afford the corresponding thiocyanates selectively, in good to excellent yields. This improved synthetic methodology affords a facile access to tertiary thiols via the corresponding thiocyanate intermediates.