Iterative stereospecific reagent-controlled homologation of pinacol boronates by enantioenriched alpha-chloroalkyllithium reagents.
Iterative stereospecific reagent-controlled homologation of pinacol boronates by enantioenriched alpha-chloroalkyllithium reagents.
复制标题
通过对映体富集的α-氯烷基锂试剂对频哪醇硼酸酯进行迭代立体特异性试剂控制同系化。
DOI:
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发表时间:
2007
影响因子:
15
通讯作者:
M. Burge
中科院分区:
文献类型:
--
作者:
P. Blakemore;M. Burge
Reaction of pinacol boronates with putative enantioenriched α-chloroalkyllithium species, generated in situ from homochiral α-chloroalkylsulfoxides by sulfoxide ligand exchange with t-BuLi in PhMe at −78 °C, gave chain-extended boronic ester products with generally excellent stereochemical fidelity. Iteration of this stereospecific reagent-controlled homologation (StReCH) process enabled the programmed synthesis of all four stereoisomers of a stereodiad-containing model system (4-benzyl-1,6-diphenylhexan-2-ol) with er ≥ 97:3 in all cases.