The ruthenium pincer-catalyzed synthesis of γ-butyrolactones from 1,2-diols and malonates using borrowing-hydrogen methodology is reported.
本文报道了使用借氢方法,通过钌夹钳催化从1,2-二醇和丙二酸酯合成γ-丁内酯的过程。
Photocatalytic Synthesis of γ-Lactones from Alkenes: High-Resolution Mass Spectrometry as a Tool To Study Photoredox Reactions
作者:Ierasia Triandafillidi、Maroula G. Kokotou、Christoforos G. Kokotos
DOI:10.1021/acs.orglett.7b03256
日期:2018.1.5
A mild photocatalytic manifold for the synthesis of γ-lactones has been developed. Utilizing Ru(bpy)3Cl2 as the photocatalyst, a cheap and reproducible synthetic protocol for γ-lactones has been introduced. Mechanistic studies revealed the successful monitoring of photocatalyticreactions and radical intermediates via high-resolution mass spectrometry.
Nucleophilic Additions to Fused Bicyclic Five-Membered Ring Oxocarbenium Ions: Evidence for Preferential Attack on the Inside Face
作者:Deborah M. Smith、Michelle B. Tran、K. A. Woerpel
DOI:10.1021/ja0375176
日期:2003.11.1
Evidence is provided that nucleophilicattack on five-membered ring oxocarbenium ions occurs from the inside face of the envelope. An eight-five fused-bicyclic system in which two substituents are constrained to pseudoequatorial positions underwent nucleophilic addition with selectivity that was comparable to an unconstrained monocyclic system. On the other hand, a bicyclic six-five analogue underwent
Photochemical Synthesis of Lactones, Cyclopropanes and ATRA Products: Revealing the Role of Sodium Ascorbate**
作者:Marie Rrapi、Charikleia S. Batsika、Nikolaos F. Nikitas、Nicholas D. C. Tappin、Ierasia Triandafillidi、Philippe Renaud、Christoforos G. Kokotos
DOI:10.1002/chem.202400253
日期:——
Photochemistry: A direct and mild photochemical synthesis of lactones, cyclopropanes and ATRA products, utilizing sodium ascorbate or ascorbic acid as the halogen/hydrogen bonding mediator and irradiation at 370 nm, 390 nm or 427 nm LED as the irradiation source. A variety of iodo-reagents were activated via halogen or hydrogen bonding and reacted successfully with a number of alkenes without the use