Tin(II) complexes prepared by treatment of SnCl2or Sn(SR)2 with appropriate amounts of RSH and Et3N appear to be the best reducing agents for azides (to amines) reported so far. These tin(II) complexes also reduce primary and secondary aliphatic nitro compounds to oximes, usually within minutes at r.t. or hours in cold, and tertiary aliphatic as well as aromatic nitro compounds to afford the corresponding
Les organosiliciques comme agents de synthese d'acetals β-halogenes
作者:Gérard Gil
DOI:10.1016/s0040-4039(01)91172-4
日期:1984.1
The reactions of unsaturated aldehydes and ketones with diols in presence of halogenosilane lead to the synthesis of halogenoacetals in yields of 60–97 %.
Reduction of Azides to Amines Mediated by Tin Bis(1,2-benzenedithiolate)
作者:Imma Bosch、Anna M. Costa、Manuel Martín、Fèlix Urpí、Jaume Vilarrasa
DOI:10.1021/ol991359z
日期:2000.2.1
[reaction: see text] A procedure for the conversion of azides to amines, which uses NaBH4 and catalytic amounts of tin(IV) 1,2-benzenedithiolate, is disclosed. Primary, secondary, tertiary, aromatic, and heteroaromatic azides are reduced in excellent yields under very mild conditions.
Hydroxyalkyl starch derivatives and process for their preparation
申请人:Fresenius Kabi Deutschland GmbH
公开号:EP2070950A1
公开(公告)日:2009-06-17
The invention relates to a method for the preparation of a hydroxyalkyl starch derivative which comprises reacting hydroxyalkyl starch (HAS) via the optionally oxidised reducing end of the HAS with the amino group M of a crosslinking compound which , apart from the amino group, comprises a specifically protected carbonyl group, namely an acetal group or a ketal group.
本发明涉及一种制备羟烷基淀粉衍生物的方法,该方法包括通过羟烷基淀粉(HAS)的可选氧化还原端与交联化合物的氨基 M 反应,交联化合物除氨基外,还包括一个特定保护的羰基,即缩醛基或缩酮基。