Three building blocks are coupled convergently in the first total synthesis of the macrolide antibiotic 5,6-tetrahydrocineromycin B (1); the facial selective allylation of a methyl ketone is the key step of the synthesis. TBDMS=tert-butyldimethylsilyl, PMB=p-methoxybenzyl.
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Tietze et al. (2001) studied this question.
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