[structure: see text] Xerulin, an inhibitor of cholesterol biosynthesis, has been synthesized from commercially available (E)-1-bromopropene, acetylene, and propynoic acid in five steps (longest linear sequence) in 30% overall yield and >96% stereoselectivity. The preparation of (E)-iodobromoethylene and its use in the Pd-catalyzed cross coupling are two of the novel aspects of the synthesis reported
[结构:参见文本]
胆固醇生物合成
抑制剂Xerulin由市售(E)-1-
溴丙烯,
乙炔和
丙酸经五个步骤(最长的线性序列)合成,总收率30%,> 96%立体选择性。(E)-
碘溴乙烯的制备及其在Pd催化的交叉偶联中的用途是本文报道的合成的两个新颖方面。