Catalytic enantioselective silylation of acyclic and cyclic triols: application to total syntheses of cleroindicins D, F, and C.
Catalytic enantioselective silylation of acyclic and cyclic triols: application to total syntheses of cleroindicins D, F, and C.
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无环和环状三醇的催化对映选择性硅化:应用于克里米德蛋白D,F和C的总合成。
DOI:
10.1002/anie.200805338
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发表时间:
2009
影响因子:
16.6
通讯作者:
Snapper, Marc L.
中科院分区:
文献类型:
--
作者:
You, Zhen;Hoveyda, Amir H.;Snapper, Marc L.
Catalysts that promote site-selective modification of poly-functional molecules can be of significant utility in selective chemical synthesis.[1] Of particular importance are chiral catalysts that initiate enantioselective functionalization of polyoxygenated molecules [2]—entities commonly found among biologically active agents. Herein, we present methods for the enantioselective silylations [3] of acyclic and cyclic 1, 2, 3-triols [Eq.(1)]; the transformations are promoted by a readily available small-molecule catalyst and afford silyl ethers that bear a neighboring diol moiety in up to> 99:< less than 1 er (> 98% ee). Enantiomerically enriched silyl-protected triols obtained by the protocols described in this report cannot be selectively prepared by catalytic or stoichiometric dihydroxylations [4](including the directed variants).[5] The utility of the new catalytic processes is demonstrated in the context of enantioselective total syntheses of cleroindicins D, F, and C, natural products isolated from Clerodendum indicum, a plant used in China to battle malaria and rheumatism.[6, 7]
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影响因子:
2.7
作者:
Vadivel, Subramanian K.;Vardarajan, Sundarararnan;Makriyannis, Alexandros
通讯作者:
Makriyannis, Alexandros
影响因子:
5.2
作者:
Barradas, Silvia;Carmen Carreno, M.;Urbano, Antonio
通讯作者:
Urbano, Antonio
影响因子:
3.6
作者:
Lei, XG;Zaarur, N;Porco, JA
通讯作者:
Porco, JA
影响因子:
16.6
作者:
Zhao, Yu;Mitra, Aurpon W.;Snapper, Marc L.
通讯作者:
Snapper, Marc L.
影响因子:
1.8
作者:
Felpin, Francois-Xavier
通讯作者:
Felpin, Francois-Xavier