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52960-14-2

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Intramolecular asymmetric amidations of sulfonamides and sulfamates catalyzed by chiral dirhodium(II) complexes
Enantioselective intramolecular amidation of aliphatic sulfonamides was achieved for the first time by means of chiral carboxylatodirhodium(II) catalysts in conjunction with PhI(OAc)2 and MgO in high yields and with enantioselectivities of up to 66% (Scheme 3, Table 1). The best results were obtained with [Rh2{(S)-nttI)4] and [Rh 2{(R)-ntv)4] as catalysts ((S)-nttl = (αS)-α- (tert-butyl)-1,3-dioxo-2H-benz[de]isoquinoline-2-acetato, (R)-nto = (αR)-α-isopropyl-1,3-dioxo-2H-benz[de] isoquinoline-2-acetato). In addition, these carboxylatodirhodium(II) catalysts were also efficient in intramolecular amidations of aliphatic sulfamates esters, although the enantioselectivity of these latter reactions was significantly lower (Scheme 4, Table 3).
Fruit, Corinne,Mueller, Paul
p. 1607 - 1615
(2007/10/03)

Benzimidazole derivatives
A novel benzimidazole derivative or a salt thereof is provided, which is represented by the formula: wherein R1represents an alkyl group, etc., R2represents a substituted or unsubstituted aromatic lower alkyl group, R3represents an alkyl group, etc., and -X- is represented by the following formula (V): etc. This derivative or a salt thereof is useful as medicine.
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(2008/06/13)

REARRANGEMENT OF SULFONAMIDYL RADICALS WITH HYDROGEN MIGRATION
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Troyanskii, E. I.,Lazareva, M. I.,Nikishin, G. I.
p. 1428 - 1434
(2007/10/02)

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Chemical Properties

Boiling Point: 256.291 °C at 760 mmHg
Flash Point:108.801 °C
Density: 1.114 g/cm³
Vapor Pressure: 0.016mmHg at 25°C
Refractive Index: 1.466
PSA: 68.54000
LogP: 2.24620

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