Preparation of Sulfonamides from Sodium Sulfonates: Ph3P ⋅ Br2 and Ph3P ⋅ Cl2 as a Mild Halogenating Reagent for Sulfonyl Bromides and Sulfonyl Chlorides
Analogs of isovaleramide, a pharmaceutical composition including the same, and a method of treating central nervous system conditions or diseases
申请人:Artman D. Linda
公开号:US20060025477A1
公开(公告)日:2006-02-02
An isovaleramide analog having at least one of an increased potency, an increased half-life, and an increased stability compared to isovaleramide. The isovaleramide analog is a cyclic analog or a noncyclic analog. The isovaleramide analog is formulated into a pharmaceutical composition. A method of treating a central nervous system condition or disease is also disclosed. The method comprises administering an isovaleramide analog to a patient suffering from the central nervous system condition or disease.
tert-Butyl Cation Formation in the Hydrolysis of 2-Methyl-2-propanesulfonyl Chloride, the Simplest Tertiary Alkanesulfonyl Chloride
作者:James F. King、Joe Y. L. Lam、Vinod Dave
DOI:10.1021/jo00114a036
日期:1995.5
Evidence is presented that the only significant reaction of 2-methyl-2-propanesulfonyl chloride (1) (a) in water over the pH range 3.5-13.0 or (b) in methanol-chloroform-d is an ionization to the tert-butyl cation (2) and the chlorosulfite anion (ClSO2-), followed by further reactions of these species. The organic products include isobutylene (3), tert-butyl chloride (4a), tert-butyl alcohol (4b), and, at high pH, 2-methyl-2-propanesulfinate anion (6) and small amounts of 2-methyl-2-propanesulfonate anion (5). In the presence of barium chloride the rate of hydrolysis of 1 is constant over the pH range 3.5-12.0.