Abstract Treatment of peptidoglycan monomer ( 1 ) from Brevibacterium divaricatum with aqueous ammonia led to cleavage of the C-3 ether linkage in the N -acetylmuramoyl residue to give the d -lactoylpentapeptide and a saturated disaccharide. By using 13 C-n.m.r. spectroscopy, the disaccharide was identified as chitobiosamine. Alkaline treatment of model compounds under similar conditions showed that
摘要用
氨水处理二
水短螺旋杆菌的肽聚糖单体(1)导致N-乙酰基村酰基残基中的C-3醚键断裂,得到d-
乳糖基五肽和饱和二糖。通过使用13 Cn.mr光谱,该二糖被鉴定为
壳聚糖。在类似条件下对模型化合物进行碱处理,结果表明未取代的C-1的N-乙酰基村酰基衍
生物在C-3处裂解,得到相应的2-乙酰
氨基-2-脱氧-d-
吡喃
葡萄糖衍
生物。1 Hn.mr光谱监测1与
氨的反应,并从获得的数据中计算出速率常数和活化能。