A synthesis of (±)-thia-calanolide A, its resolution and in vitro biological evaluation
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A synthesis of (±)-thia-calanolide A 3 has been successfully accomplished starting from 3,5-dimethoxythiophenol 4, in six steps in an overall yield of 4.5%. The key reaction involved Friedel-Crafts tigloylation of 5,7-dihydroxy-4-n-propyl thiocoumarin 6 emplo... ...
