Iron(III) catalyzed halo-functionalization of alkynes
摘要:
Aromatic and aliphatic alkynes can be halo-functionalized to alpha,alpha-dihalodimethyl ketals catalyzed by FeCl3 in excellent yields. MeOH is used as a nucleophilic solvent and N-halosuccinimide as the halogen source for this efficient transformation. The resulting alpha,alpha-dibromodimethyl ketals can be converted to the corresponding alpha,alpha-dibromoketones by treatment with 8% FeCl3 in silica gel. (C) 2015 Elsevier Ltd. All rights reserved.
Iron(III) catalyzed halo-functionalization of alkynes
摘要:
Aromatic and aliphatic alkynes can be halo-functionalized to alpha,alpha-dihalodimethyl ketals catalyzed by FeCl3 in excellent yields. MeOH is used as a nucleophilic solvent and N-halosuccinimide as the halogen source for this efficient transformation. The resulting alpha,alpha-dibromodimethyl ketals can be converted to the corresponding alpha,alpha-dibromoketones by treatment with 8% FeCl3 in silica gel. (C) 2015 Elsevier Ltd. All rights reserved.
Reactions of terminal alkynes with iodine in methanol
作者:Victor L. Heasley、Dale F. Shellhamer、Lynn E. Heasley、David B. Yaeger、Gene E. Heasley
DOI:10.1021/jo01311a020
日期:1980.11
m-Iodosylbenzoic acid, a tagged hypervalent iodine reagent for the iodo-functionalization of alkenes and alkynes
作者:Mekhman S. Yusubov、Roza Ya. Yusubova、Andreas Kirschning、Joo Yeon Park、Ki-Whan Chi
DOI:10.1016/j.tetlet.2007.12.120
日期:2008.2
An efficient and facile method for the iodo-functionalization of alkenes 5 and alkynes 6 by using recyclable ni-iodosylbenzoic acid (2) was developed. The final products can be easily isolated without any chromatographic purification by simple treatment of the crude mixture with an anionic exchange resin. Unreacted m-iodosylbenzoic acid and reduced m-iodobenzoic acid are effectively recovered from the resin by acidification with hydrochloric acid. (c) 2008 Elsevier Ltd. All rights reserved.
Facile formations of ketals of α, α-dihaloacetophenones
作者:Pakorn Bovonsombat、Edward McNelis
DOI:10.1016/s0040-4039(00)74668-5
日期:1992.7
Ketals of alpha, alpha-dihaloacetophenones are prepared in high yields from phenylethyne and N-halosuccinimide with catalytic quantities of p-toluenesulfonic acid.
HEASLEY V. L.; SHELLHAMER D. F.; HEASLEY L. E.; YAEGER D. B.; HEASLEY G. +, J. ORG. CHEM., 1980, 45, NO 23, 4649-4652
作者:HEASLEY V. L.、 SHELLHAMER D. F.、 HEASLEY L. E.、 YAEGER D. B.、 HEASLEY G. +
DOI:——
日期:——
Iron(III) catalyzed halo-functionalization of alkynes
作者:Bryant Catano、John Lee、Claudia Kim、David Farrell、Jeffrey L. Petersen、Yalan Xing
DOI:10.1016/j.tetlet.2015.05.039
日期:2015.7
Aromatic and aliphatic alkynes can be halo-functionalized to alpha,alpha-dihalodimethyl ketals catalyzed by FeCl3 in excellent yields. MeOH is used as a nucleophilic solvent and N-halosuccinimide as the halogen source for this efficient transformation. The resulting alpha,alpha-dibromodimethyl ketals can be converted to the corresponding alpha,alpha-dibromoketones by treatment with 8% FeCl3 in silica gel. (C) 2015 Elsevier Ltd. All rights reserved.