76357-58-9Relevant articles and documents
Steric Effects in the Ring-expansion of Coumarins by 2-Diazopropane and t-Butyldiazomethane
Dean, Francis M.,Park, B. Kevin
, p. 2937 - 2942 (2007/10/02)
3-Cyanocoumarin gives in high yields its 4-isopropyl derivative with 2-diazopropane and its 4-t-butyl derivative with t-butyldiazomethane showing that the 4-alkylation of 3-cyanocoumarin is general and unaffected by bulky substituents on the diazoalkane.W
