Novel and Expedient Regioselective Synthesis of 2-Imino-3-methyl-2,3-dihydrothiazoles
作者:Ranjana Aggarwal、Rajiv Kumar
DOI:10.1080/00397910802029356
日期:2008.6.20
Cyclization of alpha-tosyloxyacetophenones 1 and N-methylthiourea 2 in acidic medium affords a novel and expedient method to synthesize 2-imino-3-methyl-2,3-dihydrothiazoles 3 with excellent level of regiocontrol.
BRAMLEY S. E.; DUPPLIN V.; GOBERDHAN D. G. C.; MEAKINS G. D., J. CHEM. SOC. PERKIN TRANS.,(1987) N 3, 639-643
作者:BRAMLEY S. E.、 DUPPLIN V.、 GOBERDHAN D. G. C.、 MEAKINS G. D.
DOI:——
日期:——
Bramley, (Miss) Susan E.; Dupplin, Viscount; Goberdhan, Dhanesh G. C., Journal of the Chemical Society. Perkin transactions I, 1987, p. 639 - 644
作者:Bramley, (Miss) Susan E.、Dupplin, Viscount、Goberdhan, Dhanesh G. C.、Meakins, G. Denis
DOI:——
日期:——
Effect of Substituents on the Regioselectivity of the Reaction of α-Tosyloxyketones with Thioureas in Acidic Medium: Access to 2-Aminothiazoles and 2-Imino-2,3-dihydrothiazoles
作者:Ranjana Aggarwal、Rajiv Kumar、Dionisia Sanz、Rosa M. Claramunt
DOI:10.1002/jhet.1676
日期:2014.5
Regioselective condensation of α‐tosyloxyacetophenones 1 and N‐substituted thioureas 2 in acidicmedium to give regioisomers 2‐aminothiazoles I and 2‐imino‐2,3‐dihydrothiazoles II is largely influenced by the substituents present on 1 and 2. A mechanism, supported by DFT calculations has been proposed to explain the observed regioselectively.