Regiospecific iodocyclization of S-allyl dithiocarbamates: synthesis of 2-imino-1,3-dithiolane and 2-iminium-1,3-dithiolane derivatives
摘要:
4-Alkyl-2-imino-1,3-dithiolanes and 4-alkyl-2-iminium-1,3-dithiolanes were prepared in excellent yields with complete regiospecificity under mild conditions by the iodocyclization of S-allyl dithiocarbamates. Dehydrohalogentaion of the 4-alkyl-2-imino-1,3-dithiolanes gave 4-alkylidene-2-imino-1,3-dithiolanes in excellent yields. (C) 2009 Elsevier Ltd. All rights reserved.
Straightforward and Highly Efficient Catalyst-Free One-Pot Synthesis of Dithiocarbamates under Solvent-Free Conditions
作者:Najmedin Azizi、Fezzeh Aryanasab、Mohammad R. Saidi
DOI:10.1021/ol0620141
日期:2006.11.9
[Structure: see text] A highlyefficient and simple synthesis of dithiocarbamates is possible based on the one-pot reaction of amines, CS2, and alkyl halides without using a catalyst under solvent-free conditions. The mild reaction conditions, high yields, and broad scope of the reaction illustrate the good synthetic utility of this method. The reaction is a highly atom-economic process for production
A transition metal mediated chain transfer agent controlled polymerization process is described. The process combines the advantages of atom transfer radical polymerization (ATRP) and reversible addition fragmentation transfer (RAFT) polymerization. Synthesis of chain transfer agents useful in the disclosed processes is also disclosed. Other improvements on ATRP RAFT processes are also described.
A nematocidal composition containing as active ingredient(s) dithiocarbamate compound(s) represented by the general formula, ##STR1## wherein R and R.sup.1 are each lower alkyl groups and R.sup.2 is a group of --CH.sub.2 C.tbd.CH, --CH.sub.2 CH.dbd.CH.sub.2, ##STR2## or --CH.sub.2 --CH.dbd.CHCH.sub.3.