Predicting the Diastereoselectivity of Rh-Mediated Intramolecular C−H Insertion
摘要:
Rhodium-mediated cyclization of the alpha-diazo ester 1 proceeds with high diastereoselectivity, to give the trisubstituted cyclopentane 5. A computational model (ZINDO and Molecular Mechanics) based on our current mechanistic understanding of the reaction is presented. This model correctly predicts the dominant diastereomer from the cyclization of 1 and the eight (Table 2) other alpha-diazo esters studied thus far.
Predicting the Diastereoselectivity of Rh-Mediated Intramolecular C−H Insertion
摘要:
Rhodium-mediated cyclization of the alpha-diazo ester 1 proceeds with high diastereoselectivity, to give the trisubstituted cyclopentane 5. A computational model (ZINDO and Molecular Mechanics) based on our current mechanistic understanding of the reaction is presented. This model correctly predicts the dominant diastereomer from the cyclization of 1 and the eight (Table 2) other alpha-diazo esters studied thus far.
Friedel–Crafts reactions of n-alkenoic acids and ω-chloroalkanoic acids
作者:M. F. Ansell、G. F. Whitfield
DOI:10.1039/j39710001098
日期:——
The Friedel–Craftsreactions between benzene and pent-2-enoic, pent-3-enoic, pent-4-enoic, 5-chloropentanoic, non-2-enoic, non-8-enoic, and 9-chlorononanoic acid are reported. The nature of the products obtained in the reactions of the alkenoic acids were shown to be dependent on the initial position of the double bond. A rationalisation of these observations is presented. New syntheses of non-8-enoic