Anti-Markovnikov Hydroazidation of Activated Olefins via Organic Photoredox Catalysis
作者:Nicholas P. R. Onuska、Megan E. Schutzbach-Horton、José L. Rosario Collazo、David. A. Nicewicz
DOI:10.1055/s-0039-1690691
日期:2020.1
bioactive and medicinally relevant molecules. Historically, the formal hydroazidation of simple activatedolefins and styrenes has proven difficult due to the inherent propensity of these compounds to oligomerize. Herein is disclosed a method for the anti-Markovnikov hydroazidation of activatedolefins, catalyzed by an organic acridinium salt under irradiation from blue LEDs. This method is applicable
Multiple Halogenation of Aliphatic C−H Bonds within the Hofmann-Löffler Manifold
作者:Estefanía Del Castillo、Mario D. Martínez、Alexandra E. Bosnidou、Thomas Duhamel、Calvin Q. O'Broin、Hongwei Zhang、Eduardo C. Escudero-Adán、Marta Martínez-Belmonte、Kilian Muñiz
DOI:10.1002/chem.201804504
日期:2018.11.22
position‐selective polyhalogenation of aliphatichydrocarbon bonds is presented. The reaction proceeded within the Hofmann‐Löffler manifold with amidyl radicals as the sole mediators to induce selective 1,5‐ and 1,6‐hydrogen‐atom transfer followed by halogenation. Multiple halogenation events of up to four innate C−H bond functionalizations were accomplished. The broad applicability of this new entry into polyhalogenation
provided. The C–H amination can provide the corresponding amino derivatives on a gram scale. Various methods for the cleavage of the sulfonimidoyl group to give the corresponding tert-butoxycarbonyl- or acetyl-protected optically pure amines are also described. An efficient asymmetric C–H amination of benzylic and allylic substrates, as well as of adamantane derivatives, through catalytic C–H insertion
Stereoselective dioxygenase-catalysed benzylic hydroxylation at prochiral methylene groups in the chemoenzymatic synthesis of enantiopure vicinal aminoindanols
作者:Derek R. Boyd、Narain D. Sharma、Nigel I. Bowers、Peter A. Goodrich、Melanie R. Groocock、A. John Blacker、David A. Clarke、Tina Howard、Howard Dalton
DOI:10.1016/0957-4166(96)00180-2
日期:1996.6
Enantiopure benzylic alcohols containing two stereogenic centres in a cis-relationship result from stereoselective monohydroxylation of achiral 2-substituted indans in cultures of Pseudomonas putida UV4 and are used in the chemoenzymatic synthesis of both cis- and trans-aminoindanol enantiomers. (C) 1996 Elsevier Science Ltd
Bowers, Nigel I.; Boyd, Derek R.; Sharma, Narain D., Journal of the Chemical Society. Perkin transactions I, 1999, # 11, p. 1453 - 1461
作者:Bowers, Nigel I.、Boyd, Derek R.、Sharma, Narain D.、Goodrich, Peter A.、Groocock, Melanie R.、Blacker, A. John、Goode, Paul、Dalton, Howard