Thiosugars II. A novel approach to thiodisaccharides The synthesis of 3-deoxy-4-thiocellobiose from levoglucosenone
作者:Zbigniew J. Witczak、Renu Chhabra、Hong Chen、Xiang-Qun Xie
DOI:10.1016/s0008-6215(97)00100-6
日期:1997.6
Abstract An expeditious methodology for the synthesis of β-(1 → 4)-3-deoxythiodisaccharides (3-deoxythiocellobiose) has been developed. The methodology is based on the stereoselective Michael addition of 2,3,4,6-tetra-O-acetyl-1-thio-β-d-glucose to levoglucosenone, followed by stereoselective reduction at C-2 with l -Selectride® and DIBAH, followed by acetolysis to the target thiodisaccharide derivative
Thio-sugars VII. Effect of 3-deoxy-4-S-(β-d-gluco- and β-d-galactopyranosyl)-4-thiodisaccharides and their sulfoxides and sulfones on the viability and growth of selected murine and human tumor cell lines
作者:Zbigniew J Witczak、Peter Kaplon、P Markus Dey
DOI:10.1016/s0008-6215(02)00394-4
日期:2003.1
(PANC-1) cells with compounds 8 and 9 having IC(50) values of 6.4 microg/mL and 8.2 microg/mL, respectively. Sulfone derivatives 16 and 17 also had pronounced effects on PANC-1 cell viability (IC(50)=10.2 microg/mL and 9.6 microg/mL, respectively). These results indicate that deoxythio-disaccharide analogs generated by functionalization of the universal chiral precursor levoglucosenone may have cytotoxic