Asymmetric 1,4-dihydroxylation of 1,3-dienes by catalytic enantioselective diboration.
Asymmetric 1,4-dihydroxylation of 1,3-dienes by catalytic enantioselective diboration.
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DOI:
10.1021/ja809610h
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发表时间:
2009-07-08
影响因子:
15
通讯作者:
Morken JP
中科院分区:
文献类型:
--
作者:
Burks HE;Kliman LT;Morken JP
The asymmetric 1,4-dihydroxylation of 1,3-dienes, and other transformations, are initiated by the Pt-catalyzed enantioselective addition of bis(pinacolato)diboron (B2(pin)2) to conjugated dienes. The studies reported in this communication suggest that both cyclic and acyclic substrates will participate in this reaction, however, dienes which are unable to adopt the S-cis conformation are unreactive. For most substrates, 1,4-addition is the predominant pathway. In addition to oxidation to the derived 2-buten-1,4-diol, stereoselective carbonyl allylation with the intermediate bis(boronate) ester is also described.
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15
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