Synthesis and ring-opening reactions of 4-chloro-4-deoxy-α-d-galactopyranosyl 3,4-anhydro-1,6-dichloro-1,6-dideoxy-β-d-lyxo-hexulofuranoside
作者:Riaz Khan、Gita Patel、Khizar S. Mufti
DOI:10.1016/0008-6215(90)84190-6
日期:1990.4
Abstract Treatment of 4-chloro-4-deoxy-α- d -galactopyranosyl 1,6-dichloro-1,6-dideoxy-β- d -fructofuranoside ( 1 ) with 2.3 mol. equiv. of diethyl azodicarboxylate (DEAD) and 1.3 mol. equiv. of triphenylphosphine (TPP) in toluene gave a mixture of 3,6-anhydro-4-chloro-4-deoxy-α- d -galactopyranosyl 3,4-anhydro-1,6-dichloro-1,6-dideoxy-β- d - lyxo -hexulofuranoside ( 2 , 55%) and 4-chloro-4-deoxy-α-
摘要用2.3 mol处理4-氯-4-脱氧-α-d-半乳糖吡喃糖基1,6-二氯-1,6-二脱氧-β-d-果糖呋喃糖苷(1)。当量 偶氮二羧酸二乙酯(DEAD)和1.3摩尔。当量 甲苯中的三苯膦(TPP)生成3,6-脱水-4-氯-4-脱氧-α-d-吡喃半乳糖基3,4-脱水-1,6-二氯-1,6-二脱氧-β-的混合物d-lyxo-hexulofuranoside(2,55%)和4-chloro-4-deoxy-α-d -galactopyranosyl3,4-anhydro-1,6-dichloro-1,6-dideoxy-β-d-lyxo-hexulofuranosideside (3,35%)。化合物3也由6-O-叔丁基二苯基甲硅烷基-4-氯-4-脱氧-α-d-吡喃半乳糖苷1,6-二氯-1,6-二脱氧-β-d-果糖呋喃糖苷通过DEAD-TPP环氧化而合成用四丁基氟化铵除去甲硅烷基醚基。2,3