A Convergent Approach toward the C1-C11 Subunit of Phoslactomycins and Formal Synthesis of Phoslactomycin B.

[摘要]：The prepn. of the C1-C11 subunit I of phoslactomycins, and a formal synthesis of phoslactomycin B, were achieved by a convergent strategy involving the chelation-controlled addn. of an alkynyl Grignard reagent to an a-alkoxy ketone. Catalytic enantioselective redns. of acetylenic ketones and a [2,3]-Wittig rearrangement were utilized as key steps to control the configuration of the C4, C5, and C9 stereocenters.

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