Synthesis and liquid crystalline properties of the n-alkyl 1-thio-α-d-glucopyranosides, a new homologous series of carbohydrate mesogens
作者:Henk A. van Doren、Ralph van der Geest、Richard M. Kellogg、Hans Wynberg
DOI:10.1016/0008-6215(89)85007-4
日期:1989.12
deacetylation. The n -propyl and n -butyl derivatives are not thermotropic, the n -pentyl derivative is monotropic, and the compounds with n -hexyl and longer alkyl chains are enantiotropic, the largest liquid crystalline range being from ±100–175° for the n -undecyl derivative. The transition point data are typical for smectic behavior, and X-ray data and texture observations are indicative of a smectic A d phase
摘要用1,2,3,4,6-五戊-O-乙酰基-β-d-吡喃葡萄糖处理1,2,3,4,6-戊-O-乙酰基-β-d-吡喃葡萄糖制备了n-烷基1-硫代-α-d-吡喃葡萄糖苷(正丙基至正十二烷基)。在三氟化硼醚化物的存在下链烷硫醇,然后脱乙酰化。正丙基和正丁基衍生物不是热致性的,正戊基衍生物是单亲的,具有正己基和较长烷基链的化合物是对映体的,n的最大液晶范围为±100–175° -十一烷基衍生物。转变点数据是近晶行为的典型特征,X射线数据和纹理观察表明近晶A d相。