Use of 2,3-bis(phenylsulfonyl)-1-propene as a multicoupling reagent
摘要:
2,3-Bis(phenylsulfonyl)-1-propene (1) reacts with various amines to afford products derived from addition across the double bond as well as S(N)2' displacement. When treated with 2-piperidinemethanol, bissulfone 1 gave the expected S(N)2' product which was converted to the corresponding bromide and cyclized with tributyltin hydride to a bicyclic amine. Reaction of bissulfone 1 with furfurylamine followed by treatment with acetyl chloride afforded the product derived from a tandem S(N)2' displacement-intramolecular Diels-Alder reaction. Several novel heterocyclic compounds were prepared by connecting two nucleophilic sites with a carbon-carbon bond and allowing this reagent to react with bissulfone 1. The reaction of 1 with the pyrrolidine enamine derived from cyclohexanone gave bicyclo[3.3.1]nonan-9-one in 78% yield. The soft nucleophile approach is not the only way to add carbon centers to bissulfone 1. Radical attack on the double bond of 1 leads to an intermediate sulfonyl-stabilized radical. This species readily fragments to produce a new vinyl sulfone which undergoes further radical cyclization to give six-membered ring sulfones.
Use of 2,3-bis(phenylsulfonyl)-1-propene as a multicoupling reagent
摘要:
2,3-Bis(phenylsulfonyl)-1-propene (1) reacts with various amines to afford products derived from addition across the double bond as well as S(N)2' displacement. When treated with 2-piperidinemethanol, bissulfone 1 gave the expected S(N)2' product which was converted to the corresponding bromide and cyclized with tributyltin hydride to a bicyclic amine. Reaction of bissulfone 1 with furfurylamine followed by treatment with acetyl chloride afforded the product derived from a tandem S(N)2' displacement-intramolecular Diels-Alder reaction. Several novel heterocyclic compounds were prepared by connecting two nucleophilic sites with a carbon-carbon bond and allowing this reagent to react with bissulfone 1. The reaction of 1 with the pyrrolidine enamine derived from cyclohexanone gave bicyclo[3.3.1]nonan-9-one in 78% yield. The soft nucleophile approach is not the only way to add carbon centers to bissulfone 1. Radical attack on the double bond of 1 leads to an intermediate sulfonyl-stabilized radical. This species readily fragments to produce a new vinyl sulfone which undergoes further radical cyclization to give six-membered ring sulfones.
Synthesis of vinylic and cyclic sulfones via a radical addition-elimination sequence
作者:Albert Padwa、S.Shaun Murphree、Philip E. Yeske
DOI:10.1016/s0040-4039(00)89004-8
日期:——
PADWA, ALBERT;MURPHREE, G. SHAUN;YESKE, PHILIP E., TETRAHEDRON LETT., 31,(1990) N1, C. 2983-2986
作者:PADWA, ALBERT、MURPHREE, G. SHAUN、YESKE, PHILIP E.
DOI:——
日期:——
Use of 2,3-bis(phenylsulfonyl)-1-propene as a multicoupling reagent
作者:Albert Padwa、Donald N. Kline、S. Shaun Murphree、Philip E. Yeske
DOI:10.1021/jo00027a052
日期:1992.1
2,3-Bis(phenylsulfonyl)-1-propene (1) reacts with various amines to afford products derived from addition across the double bond as well as S(N)2' displacement. When treated with 2-piperidinemethanol, bissulfone 1 gave the expected S(N)2' product which was converted to the corresponding bromide and cyclized with tributyltin hydride to a bicyclic amine. Reaction of bissulfone 1 with furfurylamine followed by treatment with acetyl chloride afforded the product derived from a tandem S(N)2' displacement-intramolecular Diels-Alder reaction. Several novel heterocyclic compounds were prepared by connecting two nucleophilic sites with a carbon-carbon bond and allowing this reagent to react with bissulfone 1. The reaction of 1 with the pyrrolidine enamine derived from cyclohexanone gave bicyclo[3.3.1]nonan-9-one in 78% yield. The soft nucleophile approach is not the only way to add carbon centers to bissulfone 1. Radical attack on the double bond of 1 leads to an intermediate sulfonyl-stabilized radical. This species readily fragments to produce a new vinyl sulfone which undergoes further radical cyclization to give six-membered ring sulfones.