Novel 5- and 6-subtituted benzothiazoles with improved physicochemical properties: Potent S1P1 agonists with in vivo lymphocyte-depleting activity
摘要:
An SAR campaign designed to increase polarity in the 'tail' region of benzothiazole 1 resulted in two series of structurally novel 5- and 6-substituted S1P(1) agonists. Structural optimization for potency ultimately delivered carboxamide (+)-11f, which in addition to possessing improved physicochemical properties relative to starting benzothiazole 1, also displayed good S1P(3) selectivity and acceptable in vivo lymphocyte-depleting activity. (C) 2011 Published by Elsevier Ltd.
Mechanistic Studies on Thiazolidine Formation in Aldehyde/Cysteamine Model Systems
作者:Tzou-Chi Huang、Lee-Zen Huang、Chi-Tang Ho
DOI:10.1021/jf9705633
日期:1998.1.1
A mechanism was proposed to elucidate the formation of a thiazolidine in aldehyde/cysteamine modelsystems. Buffer dramatically promotes thiazolidine formation from formaldehyde and cysteamine. Phosphate tends to stabilize the primary carbocation formed, and this may lead to completion of the cyclization by attack of the amino nitrogen on the activated carbon. Protic solvent, by removing the water