作者:Pietro Bollinger、Philip Cooper、Hans U. Gubler、Albert Leutwiler、Trevor Payne
DOI:10.1002/hlca.19900730507
日期:1990.8.8
order to prepare derivatives with a wide variety of substituents in the aromatic part of the molecule, a new synthesis of the key intermediates 9a-g was developed starting from thiophene-3-carboxylic acid (11) and substituted benzyl bromides. The conversion of 9a-g to 10a-g follows a known procedure. Ketones 10a-g, on reaction with alkyl (dialkoxy-phosphoryl)acetate, followed by isomer separation and