Diamideinsecticides, represented by chlorantraniliprole (CHL), were widely applied in the control of lepidopteran insects. In efforts to develop bioactive diamides with novel scaffolds, we design and synthesized a series of diamides containing central aminoacids to conformationally simulate CHL. Bioassay results indicated that most compounds containing 1-aminocyclopropane-1-carboxylic acid exhibited
Bifunctional Iminophosphorane-Catalyzed Enantioselective Sulfa-Michael Addition to Unactivated α,β-Unsaturated Amides
作者:Daniel Rozsar、Michele Formica、Ken Yamazaki、Trevor A. Hamlin、Darren J. Dixon
DOI:10.1021/jacs.1c11898
日期:2022.1.19
unactivated α,β-unsaturatedamides is described. Consistently high enantiomeric excesses and yields were obtained over a wide range of alkyl thiol pronucleophiles and electrophiles under mild reaction conditions, enabled by a novel squaramide-based bifunctional iminophosphorane catalyst. Low catalyst loadings (2.0 mol %) were achieved on a decagram scale, demonstrating the scalability of the reaction. Computational
Development of P∗-monodentate diamidophosphites with a C1-symmetric 1,2-diamine backbone: the effects of substituents in the 1,3,2-diazaphospholidine cycle on Pd-catalyzed asymmetric allylations
作者:Konstantin N. Gavrilov、Alexei A. Shiryaev、Sergey V. Zheglov、Oksana V. Potapova、Ilya V. Chuchelkin、Ivan M. Novikov、Eugenie A. Rastorguev、Vadim A. Davankov
DOI:10.1016/j.tetasy.2013.02.010
日期:2013.4
We have designed and synthesized a small library of modular monodentate diamidophosphite ligands with stereogenic phosphorus atoms. The library was prepared efficiently from the commercially available and inexpensive (S)-N-Boc-amino acids. These novel ligands were screened in the Pd-catalyzed asymmetric allylations of (E)-1,3-diphenylallyl acetate with dimethyl malonate as the C-nucleophile with up to 93% ee being obtained. The results showed that the different substituents in the 1,3,2-diazaphospholidine cycle had remarkable effects on the enantioselectivity. (c) 2013 Elsevier Ltd. All rights reserved.
MPAI-Ligand Accelerated Pd-Catalyzed C(<i>sp</i><sup>3</sup>)–H Arylation of Free Aliphatic Acids