Alpha-hydroxy-beta-azido tetrazole compounds of formula (I):
a process for manufacturing alpha-hydroxy-beta-azido tetrazoles of formula (I), and their use for synthesizing new compounds, e.g. in “click” chemistry.
substrate concentrations (up to 75 g/L) to be reached. Even extremely sterically demanding epoxides such as cis‐ and trans‐stilbene oxides were transformed on a reasonable time scale. All reactions were successfully conducted on a 1 g preparative scale, generating diol‐ and epoxide‐based chiral synthons with very high enantiomeric excesses and isolated yields close to the theoretical maximum. Thus we
已用十种不同的外消旋和内消旋体测试了在大肠杆菌RE3中过表达的环氧水解酶Kau2α,β-二取代的芳族环氧化物。一些经过测试的底物是双功能的,其中大多数是合成化学应用中非常有用的构建基块。作为一种普遍趋势,Kau2被证明是一种对映体选择性极强的生物催化剂,除了几乎对映体纯净的形式外,还获得了生物转化的二醇产物和剩余的环氧化物(有两个例外)。此外,反应时间通常很短(大约1小时,使用二氧化二苯乙烯时除外),并且有机共溶剂的使用被很好地耐受,从而可以达到很高的底物浓度(最高75 g / L)。 。甚至对空间要求极高的环氧化物,例如顺式和反式sti氧化物在合理的时间范围内转化。所有反应均以1 g制备规模成功进行,生成了对映体过量非常高且分离出的收率接近理论最大值的基于二醇和环氧化物的手性合成子。因此,我们在这里证明了表达Kau2环氧水解酶作为高度对映选择性的生物催化剂的冻干大肠杆菌细胞的有用性和多功