Hexafluoroisopropyl Sulfamate: A Useful Reagent for the Synthesis of Sulfamates and Sulfamides
作者:Matthew A. Sguazzin、Jarrod W. Johnson、Jakob Magolan
DOI:10.1021/acs.orglett.1c00855
日期:2021.5.7
Sulfamates and sulfamides are most often synthesized from alcohols and amines with sulfamoylchloride, which is an unstable reagent. We have identified hexafluoroisopropyl sulfamate (HFIPS) as a bench-stable solid that reacts readily with a wide variety of alcohols, amines, phenols, and anilines under mild reaction conditions. The sole byproduct of the reaction is hexafluoroisopropanol (HFIP) and reaction
Catalytic Sulfamoylation of Alcohols with Activated Aryl Sulfamates
作者:Peter B. Rapp、Koichi Murai、Naoko Ichiishi、David K. Leahy、Scott J. Miller
DOI:10.1021/acs.orglett.9b04119
日期:2020.1.3
alcohol sulfamoylation that deploys electron-deficient aryl sulfamates as activated group transfer reagents. The reaction utilizes the simple organic base N-methylimidazole, proceeds under mild conditions, and provides intrinsic selectivity for 1° over 2° alcohols (up to >40:1 for certain nucleosides). The requisite aryl sulfamate donors are stable crystalline solids that can be readily prepared on
Anticonvulsant O-alkyl sulfamates. 2,3:4,5-Bis-O-(1-methylethylidene)-.beta.-D-fructopyranose sulfamate and related compounds
作者:Bruce E. Maryanoff、Samuel O. Nortey、Joseph F. Gardocki、Richard P. Shank、Susanna P. Dodgson
DOI:10.1021/jm00388a023
日期:1987.5
Novel sugar sulfamate 1 (McN-4853, topiramate) has been found to exhibit potent anticonvulsant activity analogous to that of phenytoin. In the maximal electroshock seizure test, orally at 2 h in mice, 1 had an ED50 of 39 mg/kg. Orally, 1 had a duration of action in excess of 8 h. Other aspects of the pharmacology of 1, as well as neurochemistry and carbonic anhydrase inhibition, are discussed. The
Intramolecular amidation of sulfamate esters catalyzed by metalloporphyrins
申请人:——
公开号:US20040019204A1
公开(公告)日:2004-01-29
The present invention relates to novel intramolecular amidation processes for substrates such as sulfamate esters using chiral and non-chiral metalloporphyrin complexes, which can maximize catalytic activity and enhance efficiency, stereoselectivity and speed of amidation of these substrates. The intramolecular amidation of sulfamate ester exhibits excellent cis-selectivity, affording cyclic sulfamidates with high ee values catalyzed by chiral metalloporphyrin.
Enantioselective intramolecular amidation of sulfamate esters catalyzed by chiral manganese(III) Schiff-base complexes
作者:Ji Zhang、Philip Wai Hong Chan、Chi-Ming Che
DOI:10.1016/j.tetlet.2005.05.146
日期:2005.8
Enantioselective intramolecularamidation of sulfamate esters catalyzed by chiral manganese(III) Schiff-base complexes under mild conditions (PhI(OAc)2, Al2O3, C6H6, 5 °C) was achieved in moderate to good yields (up to 92%), substrate conversions (up to 99%), with virtually complete cis-selectivity and with ee values up to 79% ee.
通过温和的条件下的手性锰(III)的席夫碱配合物催化的氨基磺酸酯的对映选择性的分子内酰胺化(PHI(OAC)2,AL 2 ö 3,C 6 H ^ 6,5℃)在中度至良好的产率达到(最多至92%),底物转化率(高达99%),几乎完全的顺式选择性和ee值高达ee的79%。