Solvent-Dependent Change in the Rate-Determining Step of Au(I)-Catalyzed <i>N</i>-Propargyl Benzamide Cyclization.

ABSTRACT: The cyclization of N-propargyl benzamide with gold catalysts has become a popular benchmark reaction over the past two decades. The prevailing consensus denotes protodeauration as rate-limiting. Cyclization with [L1Au(NCCH₃)]SbF₆ and L1AuOTs (L1 = t-Bu₂(o-biphenyl)P, also known as Johnphos) in dichloromethane and methanol in conjunction with deuterium labeling studies reveals a solvent-dependent switch to π-activation for the rate-limiting step. Computational calculations support this change of the rate-determining step.

SUBMITTER: Norman SG 

PROVIDER: S-EPMC12435765 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature