secondary C-Hbonds, which are adjacent to an oxygen or nitrogen atom on one side, and benzylic or adjacent to a carbonyl group on the other side. A variety of valuable fused heterocycles were obtained from easily accessible ortho-bromophenol and aniline precursors. The second C-H bond cleavage was successfully replaced with carbonyl insertion to generate other types of C(sp3 )-C(sp3 ) bonds.
Development and Mechanistic Study of Quinoline-Directed Acyl C–O Bond Activation and Alkene Oxyacylation Reactions
作者:Giang T. Hoang、Dylan J. Walsh、Kathryn A. McGarry、Constance B. Anderson、Christopher J. Douglas
DOI:10.1021/acs.joc.6b03011
日期:2017.3.17
acyl substituent across an alkene, oxyacylation of alkenes, using rhodium catalyzed C–O bond activation of an 8-quinolinyl ester is described. Our unsuccessful attempts at intramolecular carboacylation of ketones via C–C bond activation ultimately informed our choice to pursue and develop the intramolecular oxyacylation of alkenes via quinoline-directed C–O bond activation. We provide a full account
Reductive cyclization of halo-ketones to form 3-hydroxy-2-oxindoles via palladium catalyzed hydrogenation: a hydrogen-mediated Grignard addition
作者:Inji Shin、Stephen D. Ramgren、Michael J. Krische
DOI:10.1016/j.tet.2015.05.085
日期:2015.9
The reductive cyclization of N-oxoacyl ortho-bromoanilides to form 3-hydroxy-2-oxindoles under the conditions of palladium catalyzed hydrogenation is described. This work may be viewed as a prelude to intermolecular hydrogen-mediated Grignard-type reductive couplings of organic halides with carbonyl compounds.
Nickel-Catalyzed Asymmetric Addition of Aromatic Halides to Ketones: Highly Enantioselective Synthesis of Chiral 2,3-Dihydrobenzofurans Containing a Tertiary Alcohol
A highlyenantioselective and straightforward synthetic procedure to chiral 3-hydroxy-2,3-dihydrobenzofurans has been developed by nickel/bisoxazoline-catalyzed intramolecular asymmetric addition of aryl halides to unactivated ketones, giving 2,3-dihydrobenzofurans with a chiral tertiary alcohol at the C-3 position in good yields and excellent enantioselectivities (up to 92% yield and 98% ee). The
Photoreactivities of o-alkoxy- and o-tert-butylphenyl ketones: a dramatic example of conformational inversion of selectivity
作者:Peter J. Wagner、Michael A. Meador、B. P. Giri、J. C. Scaiano
DOI:10.1021/ja00290a071
日期:1985.2
Obtention du dimethyl-3,3 phenyl-1 indanol-1 a partir de la t-butyl-2 benzophenone. Obtention du dihydro-2,3 phenyl-3 benzofurannol-1 a partir de la methoxy-2 benzophenone. Mecanisme
获得二甲基-3,3 苯基-1 indanol-1 a partir de la t-丁基-2 二苯甲酮。Obtention du dihydro-2,3 phenyl-3 benzofurannol-1 a partir de la methoxy-2二苯甲酮。机制