18 Apr 23:50
by Wanle Sheng, Yayang Wu, Changjiang Yu, Petia Bobadova-Parvanova, Erhong Hao, Lijuan Jiao
Organic Letters
DOI: 10.1021/acs.orglett.8b00820
08 Jan 00:03
by Yuyang Ding, Dengfeng Xu, Shanshui Meng, Albert S. C. Chan, Yang Li, Junling Zhao
Abstract
Through a hydrogen bonding guided substrate modification strategy, we have developed a chiral phosphoric acid catalyzed highly enantioselective Friedel-Crafts reaction of N-protected 4-aminoindoles with β,γ-unsaturated α-ketimino esters. The mechanism and origins of the enantioselectivity of this process are indentified using DFT calculations. Both the experimental and calculation results indicated that the NH moiety at the indole C4 position is essential for the stereocontrol of this reaction. To further examine the potential usefulness of this method, gram scale synthesis and derivatizations of one of the products were also carried out.
29 Feb 13:48
by Florian W. Friese, Anna-Lena Dreier, Andrej V. Matsnev, Constantin G. Daniliuc, Joseph S. Thrasher and Günter Haufe
Organic Letters
DOI: 10.1021/acs.orglett.6b00136
24 Feb 13:27
by Logan W. Sardzinski, William C. Wertjes, Abigail M. Schnaith and Dipannita Kalyani
Organic Letters
DOI: 10.1021/acs.orglett.5b00241
24 Feb 12:08
by Krishnendu Maity, Dillip K. Panda, Eric Lochner and Sourav Saha
Journal of the American Chemical Society
DOI: 10.1021/ja512020w
14 Jun 08:31
by Jason D. Hackenberg, Sabuj Kundu, Thomas J. Emge, Karsten Krogh-Jespersen and Alan S. Goldman
Journal of the American Chemical Society
DOI: 10.1021/ja503953v