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Abstract
Bromoacetalisation of the cinnamyl alcohols 7a–d, obtained from the corresponding benzaldehydes, generated the bromoacetals 10a–d. The 5-exo trig radical cyclisation of the bromoacetals 10a–d followed by one step hydrolysis-oxidation of the resulting cyclic acetals 11a–d furnished the title compounds 6a–d, respectively, well-established intermediates of a variety of lignans.
ACKNOWLEDGMENT
We thank the Council of Scientific and Industrial Research, New Delhi for the award of a research fellowship to SD.