Regioselective Addition of Organic Chlorides to Epoxides in the Presence of Quaternary Ammonium Chloride
By a reaction of epoxides with organic chlorides in the presence of dodecyltrimethylammonium chloride as a catalyst, a series of 2-substituted 1-(chloromethyl)ethyl ethers were synthesized regioselectively in high yields under mild conditions.
A Facile, General Approach to the Synthesis of Electrophilic Acetone Equivalents
The facile, high-yielding, yet general synthesis of electrophilic chloroacetone equivalents 11a-f is described. The enol ethers are assembled in three steps starting with trichloride 29 in overall yields of 57-93%. Nucleophilic displacement of the chloromethyl chlorine with a range of organometallic reagents generates dichlorides 30 in yields of 58-99%, which can be dehydrohalogenated with t-BuOK/THF in yields of 87-99% to produce enol ethers 31. Conversion of the allyl chlorides 31 to the corresponding allyl iodides 11 with 72-99% yield completes the synthetic sequence. The entire sequence can be performed in less than 48 h on a 50 mmol scale.
Janicki, Slawomir Z.,Fairgrieve, Jennifer M.,Petillo, Peter A.
p. 3694 - 3700
(2007/10/03)
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