ISSN:
0021-8383
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The cycloaddition of C-(2-thenoyl)-N-arylnitrilimines 2a, b to acrylic acid derivatives 3-5, fumaric acid derivatives 9-10, benzalmalononitrile 14 and N-arylmaleimides 20 has been studied. Under thermal conditions these 1,3-dipolar cycloadditions proceed with absolute regio-chemistry to yield 5-substituted-2-pyrazolines 6-8, 11-12, 16 and 21, respectively. The cycloadducts 11 and 16 lose hydrogen cyanide to give the corresponding pyrazoles 13 and 18, respectively.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/prac.19903320410
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