期刊
TETRAHEDRON LETTERS
卷 49, 期 3, 页码 485-489出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2007.11.095
关键词
three-component reaction; benzimidazole carbene; isothiocyanate; allenoate; spiro[benzimidazoline-2,3'-tetrahydrothiophene]
The novel three-component reaction of benzimidazole carbenes with isothiocyanates and allenoates proceeded efficiently in a highly site, regio-, and stereoselective manner to produce predominantly spiro[benzimidazoline-2,3'-tetrahydrothiophene] derivatives. The reaction was proposed to occur via a tandem nucleophilic addition of carbenes to isothiocyanates followed by an unusual [3+2] cycloaddition to the less activated carbon-carbon double bond of allenoates. (C) 2007 Elsevier Ltd. All rights reserved.
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