Visible-Light-Mediated Remote γ-C(sp<sup>3</sup>)–H Functionalization of Alkylimidates: Synthesis of 4-Iodo-3,4-dihydropyrrole Derivatives
作者:Yogesh Kumar、Yogesh Jaiswal、Amit Kumar
DOI:10.1021/acs.orglett.8b02022
日期:2018.8.17
dihydropyrrole derivatives is reported. The developed protocol proceeds via chemoselective intramolecular N–C bond formation of alkylimidates through 1,5-hydrogen atom transfer from in situ generated imidate N-radicals. The major advantage of this designed strategy lies in the choice of starting materials, mild reaction conditions, high chemo- and diastereoselectivity, clean source of energy, and good functional
and ecologically benign alternatives to transition metals, although their application as molecular catalysts in challenging CH oxidation reactions has remained elusive. An attractive iodine oxidation catalysis is now shown to promote the convenient conversion of carbon–hydrogenbonds into carbon–nitrogen bonds with unprecedented complete selectivity. The reaction proceeds by two interlocked catalytic
Fluoropyrrolidines as dipeptidyl peptidase inhibitors
申请人:——
公开号:US20040171848A1
公开(公告)日:2004-09-02
The present invention relates to novel compounds, their use for inhibiting serine proteases, such as dipeptidyl peptidases, such as dipeptidyl peptidase IV (DPP-IV) and to methods for their production and their therapeutic utility.
Potassium<i> tert-</i>Butoxide Catalyzed Addition of Carbonyl Derivatives to Styrenes
作者:Alain Louis Rodriguez、Tanasri Bunlaksananusorn、Paul Knochel
DOI:10.1021/ol000174l
日期:2000.10.1
[GRAPHICS]A catalytic amount of t-BuOK in DMSO allows the addition of ketones or imines to styrenes at 40 degrees C in good to excellent yield. Nitriles add to styrenes in NMP or in DMSO at room temperature.