S R Gupta
Articles written in Proceedings – Section A
Volume 35 Issue 5 May 1952 pp 242-248
An effective method for purifying apiin from parsley seeds is to convert it into the lead salt and recover it by decomposition with hydrogen sulphide. It then crystallises readily from alcohol and yields a crystalline acetate. The work on the complete methylation and hydrolysis has been revised using the pure sample and also purifying the methylated glycoside obtained as intermediate. The resulting 5:4′-
Extraction of the parsley plant grown in Delhi yielded only apiin as the anthoxanthin component and the presence of luteolin glycoside reported by von Gerichten could not be detected.
Volume 37 Issue 5 May 1953 pp 611-619
The synthesis of 5∶7∶2′-trihydroxy and 5∶7∶2′∶4′-tetrahydroxy flavones has been repeated using Allan-Robinson condensation and both hydriodic acid and anhydrous aluminum chloride as demethylating agents. With these reagents and under ordinary conditions isomeric change involving the 2′-hydroxyl group does not occur. The tetrahydroxy flavone has also now been prepared by the procedure of Algar