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Conversion of Epoxides into Halohydrins with Elemental Halogen Catalyzed by Thiourea.

✍ Scribed by Hashem Sharghi; Mohammad Mehdi Eskandari

Publisher
John Wiley and Sons
Year
2004
Weight
125 KB
Volume
35
Category
Article
ISSN
0931-7597

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✦ Synopsis

2004 Halogenation Halogenation O 0235 Conversion of Epoxides into Halohydrins with Elemental Halogen Catalyzed by Thiourea. -Thiourea is found to be an efficient catalyst for the ring opening of epoxides (I) and (IV) with iodine or bromine under mild conditions to give Ξ²-iodoand Ξ²-bromohydrins in good to high yields. In contrast to known methods using no thiourea catalyst, the present variant proceeds with high regio-and stereoselectivities. -(SHARGHI*, H.; ESKANDARI, M. M.; Tetrahedron 59 (2003) 43, 8509-8514; Dep.

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