Hashimoto H, Ueda Y, Takasu K, Kawabata T. Catalytic Substrate-Selective Silylation of Primary Alcohols via Remote Functional-Group Discrimination.
Angew Chem Int Ed Engl 2021;
61:e202114118. [PMID:
34942061 DOI:
10.1002/anie.202114118]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Indexed: 11/07/2022]
Abstract
Silylation of alcohols has generally been known to take place at the sterically most accessible less-hindered hydroxy group. However, we report here the catalyst-controlled substrate-selective silylation of primary alcohols, where the selectivity was controlled independent of the innate reactivity of the hydroxy group based on the steric environment. The chain-length-selective silylation of 1, n- amino alcohol derivatives was achieved, where 1,5-amino alcohol derivatives showed outstanding high reactivity in the presence of analogues with a shorter or longer chain length under catalyst-controlled conditions. A highly substrate-selective catalytic silylation of pentanol analogues was also developed, in which the remote functionality at C(5) from the reacting hydroxy groups was effectively discriminated on silylation.
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