Erprobte synthese von 2-azido-2-desoxy-d-mannose und 2-azido-2-desoxy-d-mannuronsäure als baustein zum aufbau von bakterien-polysaccharid-sequenzen
作者:Hans Paulsen、Jens Peter Lorentzen、Wolfram Kutschker
DOI:10.1016/0008-6215(85)85193-4
日期:1985.2
Abstract The azidonitration of 3,4,6-tri- O -acetyl-1,5-anhydro-2-deoxy- d - arabino -hex-1-enitol at low temperature afforded preponderantly the azidonitrate having the d - manno configuration. After reaction with sodium acetate, 1,3,4,6-tetra- O -acetyl-2-azido-2-deoxy-α- d -mannopyranose was directly isolated and deblocking gave 2-azido-2-deoxy- d -mannopyranose. 3,4,6-Tri- O -acetyl-2-azido-2-deoxy-α-
摘要3,4,6-三-O-乙酰基-1,5-脱水-2-脱氧-d-阿拉伯糖-己-1-烯醇在低温下的叠氮基化主要提供了具有d-甘露聚糖构型的叠氮基硝酸盐。与乙酸钠反应后,直接分离出1,3,4,6-四-O-乙酰基-2-叠氮基-2-脱氧-α-d-甘露吡喃糖,解封得到2-叠氮基-2-脱氧-d-甘露吡喃糖。 。3,4,6-三-O-乙酰基-2-叠氮基-2-脱氧-α-d-甘露酰吡喃糖基溴化物和2-叠氮基-3,4,6-三-O-苄基-α-d-甘露酰吡喃糖基溴化物制备的并且适合于选择性α-和β-糖苷合成。在铂-氧存在下,苄基2-叠氮基-2-脱氧-α-d-甘露吡喃糖苷的催化氧化产生了高产率的(苄基2-叠氮基-2-脱氧-α-d-甘露吡喃糖苷)尿酸。获得了2-氨基-2-脱氧-d-甘露吡喃糖醛酸。通过催化氧化,