Nucleic acid related compounds. 45. A deoxygenative [1,2]-hydride shift rearrangement converting cyclic cis-diol monotosylates to inverted secondary alcohols
作者:Fritz Hansske、Morris J. Robins
DOI:10.1021/ja00360a044
日期:1983.10
Transposition de monotosylates-2' et -3' de ribonucleoside (adenosine) pour donner des produits desoxy-2' et -3' threo invertis
Transposition de monotosylates-2' et -3' de ribonucleoside (adenosine) pour donner des produits desoxy-2' et -3' threo invertis
Deoxygenative [1,2]-Hydride Shift Rearrangements in Nucleoside and Sugar Chemistry: Analogy with the [1,2]-Electron Shift in the Deoxygenation of Ribonucleotides by Ribonucleotide Reductases<sup>1</sup>
作者:Morris J. Robins、Ireneusz Nowak、Stanislaw F. Wnuk、Fritz Hansske、Danuta Madej
DOI:10.1021/jo071102b
日期:2007.10.1
semipinacol rearrangement that was observed in our laboratory has been applied to the synthesis of several furanose and pyranose derivatives. The process consists of an “orchestrated” [1,2]-hydride shift with departure of a leaving group from the opposite face. Transient formation of a CO group is followed by rapid transfer of a hydride-equivalent from the same face from which the leaving group departed
在我们的实验室中观察到的半频哪醇重排的变体已应用于几种呋喃糖和吡喃糖衍生物的合成。该过程包括“精心策划的” [1,2]氢化物转移,同时离去基团从相反的表面离开。瞬态形成C O基团后,从离去基团离开的同一面快速转移氢化物当量,这导致两个邻位碳原子处的立体化学两次反转。2'治疗ö -和3'- ö -tosyladenosine与三乙基硼锂在DMSO / THF给出了与β-相应2'-和3'-脱氧核苷类似物d -苏型配置。相同的5'- O处理-TPS -2'- ö -tosyladenosine得到9-(5- ö -TPS-2-脱氧β- d -苏-pentofuranosyl)腺嘌呤。5'-OH和5'- O - TPS化合物具有相同的[1,2]-氢化物位移和立体化学,表明不存在远端羟基参与。将该方法应用于其他核苷2'- O-甲苯磺酰基衍生物,以良好的收率得到了2'-脱氧苏糖基化合物。对于2'- O