Mandelic acids represent a key structural motif present in many drug molecules. Herein, we report the controlled meta-selective mono- and diolefination of mandelic acids by the careful design of the substrate and oxidant. Furthermore, free meta-functionalized mandelic acid was generated by selectively removing the template under mild basic conditions. The synthesis of functionalized homatropine and
The tail-to-tail dimerization of vinyl compounds catalyzed by an N-heterocycliccarbene was found to show a very broad substrate scope and tolerance to various functional groups. The optimization o...
Rhodium‐catalyzed ortho‐C−Hfunctionalization is well known in the literature. Described herein is the Xphos‐supported rhodium catalysis of meta‐C−H olefination of benzylsulfonic acid and phenyl acetic acid frameworks with the assistance of a para‐methoxy‐substituted cyano phenol as the directing group. Complete mono‐selectivity is observed for both scaffolds. A wide range of olefins and functional groups
recent developments, this work demonstrates the utilization of a chelating template backbone bearing covalently attacheddirecting groups, which enables site‐selective remote C−H functionalization of heterocycles. The observed selectivity is the outcome of non‐covalent interactions between the heterocycles and bifunctional template backbone.
An efficient method has been developed to afford highly C-5 selective olefination of thiazole derivatives utilizing a bifunctional template in an intermolecular fashion. Coordinative interaction between the substrates and the metal chelated template backbone plays a crucial role in high C-5 selectivity. Excellent selectivity for the C-5 position was observed while mono substituted (2- or 4-) or even