Highly Selective β-Mannosylations and β-Rhamnosylations Catalyzed by Bis-thiourea.

Highly Selective β-Mannosylations and β-Rhamnosylations Catalyzed by Bis-thiourea.
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DOI:
10.1021/jacs.0c04255
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发表时间:
2020-07-08
影响因子:
15
通讯作者:
Jacobsen EN
Jacobsen EN
中科院分区:
化学1区
文献类型:
--
作者:
Li Q;Levi SM;Jacobsen EN

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We report highly β-selective bis-thiourea-catalyzed 1,2-cis-O-pyranosylations employing easily accessible acetonide-protected donors. A wide variety of alcohol nucleophiles, including complex natural products, glycosides, and amino acids were β-mannosylated and rhamnosylated successfully using an operationally simple protocol under mild and neutral conditions. Less nucleophilic acceptors such as phenols were also glycosylated efficiently in excellent yields and with high β-selectivities.
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