期刊
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
卷 2017, 期 28, 页码 4130-4139出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.201700603
关键词
Synthetic methods; Heterocycles; Thiol-ynes; Cyclization; Thiazolidin-2-ylideneamine; Anion relay chemistry
资金
- Council of Scientific and Industrial Research (CSIR), New Delhi
Thiol-yne coupling of propargylamine with isothiocyanate has been developed under metal- and solvent-free conditions. The addition of propargylamine to isothiocyanate gives propargylthiourea. This intermediate in situ undergoes intramolecular 5-exo-dig cyclization to give thiazolidin-2-ylideneamine. A through-bond anion relay reaction occurs by attack of the sulfur (not the nitrogen) atom on the alkyne in a highly regioselective manner at ambient temperature. Wide varieties of thiazolidin-2-ylideneamine derivatives were formed in excellent yields.
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