Rajkumar V. Hangarge, Sanjay A. Sonwane, Dilip V. Jarikote and Murlidhar S. Shingare
Green Chem., 2001,3, 310-312
DOI:
10.1039/B106871G,
Paper
A simple, efficient and environment ecofriendly route has been developed for the synthesis of ylidenenitriles of 4-oxo-(4H)-1-benzopyran-3-carbaldehyde by the condensation of 4-oxo-(4H)-1-benzopyran-3-carbaldehyde with active methylene compounds viz. malononitrile, cyanoacetic acid and cyanoacetamide in distilled water without catalyst at 90 °C for 1–2 h with quantitative yields and higher selectivity.
