Influence of functional substitution of allyl halides on their ni(co)4 promoted carbonylative cycloaddition with acetylenes
作者:Francisco Camps、Josep M. Moreto、Lluis Pages
DOI:10.1016/s0040-4020(01)92256-2
日期:1992.4
were shown to favour competing side reactions such as allyl self-coupling. However, only cyclopentenones were obtained from either centrally or terminally substituted silylallyl halides. Substitution at both ends of the allyl moiety led to the formation of 4,5-disubstituted cyclopentenones. Important mechanistic information could be achieved from determination of the relative stereochemistry in these
Synthesis of 2,5-Diaryl-1,5-dienes from Allylic Bromides Using Visible-Light Photoredox Catalysis
作者:Gerald Pratsch、Larry E. Overman
DOI:10.1021/acs.joc.5b01962
日期:2015.11.20
Visible-light photoreductive coupling of 2-arylallyl bromides in the presence of the photocatalyst Ru(bpy)(3)(PF6)(2), a Hantzsch ester, and i-Pr2NEt gives 2,5-diaryl-1,5-dienes in high yield. This method avoids the use of stoichiometric metal reductants and is compatible with the presence of halogen, alkyl, electron-donating, and electron-withdrawing substituents on the aromatic ring.
The Formation of a Cyclic Recurring Unit in Free Radical Polymerization. II<sup>1</sup>
作者:C. S. Marvel、R. D. Vest
DOI:10.1021/ja01513a057
日期:1959.3
Photochemical [2 + 2] cycloaddition reactions at low temperatures. Synthesis of bridgehead substituted bicyclo [n.2.0]dicarboxylates from maleic acid derivatives and ethylene