Enantioselective Intramolecular C–H Insertion Reactions of Donor–Donor Metal Carbenoids
作者:Cristian Soldi、Kellan N. Lamb、Richard A. Squitieri、Marcos González-López、Michael J. Di Maso、Jared T. Shaw
DOI:10.1021/ja508586t
日期:2014.10.29
asymmetric insertion reactions of donor–donor carbenoids, i.e., those with no pendant electron-withdrawing groups, are reported. This process enables the synthesis of densely substituted benzodihydrofurans with high levels of enantio- and diastereoselectivity. Preliminary results show similar efficiency in the preparation of indanes. This new method is used in the first enantioselective synthesis of an
Pd(II)-Catalyzed Hydroxyl-Directed C−H Activation/C−O Cyclization: Expedient Construction of Dihydrobenzofurans
作者:Xisheng Wang、Yi Lu、Hui-Xiong Dai、Jin-Quan Yu
DOI:10.1021/ja105366u
日期:2010.9.8
A Pd(II)-catalyzed C-H activation/C-O cyclization reaction directed by a proximate hydroxyl group has been developed. This reaction provides a new method for constructing dihydrobenzofurans, including spirocyclic analogues, a process that is potentially applicable to natural product synthesis.