�ber die Chlorhydrine der h�hermolekularen ?-Olefine
摘要:
AbstractEs wurde die Bildung von Chlorhydrinen aus höhermolekularen, flüssigeii α‐Olefinen dureh Behandlung mit Chlor und Wasser sowie mit wasserigen Lösungen von reiner unterchloriger Säure untersucht. Einige höherniolekulare Olefinchlorhydrine wurden rein dargestellt und deren Brechungsindices und Dichten bestimmt.
Efficient synthesis of chlorohydrins using ClCH2MgCl·LiCl
作者:Rodolfo H.V. Nishimura、Fabiano T. Toledo、João L.C. Lopes、Giuliano C. Clososki
DOI:10.1016/j.tetlet.2012.10.132
日期:2013.1
The mixed lithium-magnesium carbenoid ClCH2MgCl center dot LiCl was easily generated in THF through the reaction of chloroiodomethane with i-PrMgCl-LiCl at -78 degrees C. This reagent reacts well with a number of aldehydes to give the corresponding chlorohydrins in good yields. (C) 2012 Elsevier Ltd. All rights reserved.
Novel 1,3-dialkyloxy-2-propanol and alkoxylates thereof may be prepared in good yield by a convenient process comprising adding epichlorohydrin to a stoichiometric excess of alcohol, wherein the ratio of alcohol:epichlorohydrin is at least about 3:1, preferably in the presence of a Group 1A metal hydroxide and a phase transfer catalyst. The result shows excellent selectivity of to the 1,3-substitution positions, and the alkyl chain may be saturated or unsaturated and may contain one or more heteroatoms. The alkoxylates may include repeating alkoxy units in the 2-position. The compositions are useful as surfactants, diluents, and the like.