61755-97-3Relevant articles and documents
One-pot regio- and stereoselective cyclization of 1,2,n-triols
Zheng, Tao,Narayan, Radha S.,Schomaker, Jennifer M.,Borhan, Babak
, p. 6946 - 6947 (2007/10/03)
A simple and efficient process to cyclize triols containing a 1,2-diol functionality with a pendant hydroxyl group is presented. The one-pot procedure converts the 1,2-diol into an ortho ester in situ, which upon treatment with a Lewis acid generates a cyclic acetoxonium intermediate. This intermediate is subsequently trapped by the pendant hydroxyl group to generate a cyclic ether. The stereochemistry of the 1,2-diol is transferred to the product with complete fidelity (inversion at the site of cyclization), and the reaction proceeds with high regioselectivity. The process is akin to the Lewis acid-catalyzed intramolecular ring-opening of epoxides with hydroxyl groups yielding cyclic ethers of various sizes with regio- and stereochemical control. Copyright
PYRROLIDINE DERIVATIVE AND PROCESS FOR PRODUCING THE SAME
-
Page 23, (2010/02/05)
The present invention provides a compound which has cytokine production inhibitory activity and is useful for the treatment of diseases which is associated with cytokine. The compound is represented by the following general formula (I) [wherein A represents a cyclic group which may be substituted; the partial structure -D---E- represents a group represented by -CH2CH2- or -CH=CH-; W reprensents a group represented by -CH2-, - CHzCH2-, -CH=CH- or -CH=; the partial structure >X---Y- represents a group represented by >CH-(CH2)n-, >C=CH-, >CH-CH2-CH(OH)-, >CH-CH2-C (=O) -, >CH-O- or >CH-O-CO-, provided that when W is -CH=, then X---Y- represents C-(CH2)p-; Z represents a divalent aliphatic hydrocarbon group; R1 and R2, which may be the same or different, each represents a hydrogen atom, or a hydroxyl, alkoxy or alkoxyalkoxy group; m is an integer of 0 or 1] .