154643-40-0Relevant academic research and scientific papers
Process for the preparation of acyloins
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, (2008/06/13)
A process for the preparation of acyloins of the general formula I STR1 in which Ra and Rb are the same or different and stand for hydrogen or an optionally substituted C1 -C20 alkyl, an optionally substituted C
Catalytic preparation of condensation products of formaldehyde
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, (2008/06/13)
A process for the catalytical preparation of condensation products of formaldehyde, in which formaldehyde or a formaldehyde-forming compound is caused to undergo reaction using a catalyst which has been produced, in the presence of an auxiliary base, from a triazolium salt of formula I STR1 in which R1 and R3 are the same or different and stand for aliphatic groups having from 1 to 30 carbon atoms, optionally substituted aryl groups, optionally substituted aralkyl groups, and/or optionally substituted heteroaryl groups, R2 represents hydrogen, the hydroxymethylene group --CH2 OH or the hydroxy-hydroxymethylene-methylidyne group --CH(OH)(CH2 OH), and R4 denotes hydrogen, a halogen atom, a nitro or cyano group, an aliphatic group having from 1 to 30 carbon atoms, an optionally substituted aryl group, an optionally substituted aralkyl group, an optionally substituted heteroaryl group, an alkoxy group --OR5, a thioether group --SR6, an amino group --NR7R R8, an acyl group --COR9 or an ester group --COOR10, where R5, R6, R7, R8, and R9 stand for radicals such as those stated above for R1, and R10 is a C1 -C30 alkyl group or an optionally substituted aryl or aralkyl group, or R3 and R4 together form a C3 -C5 alkylene or C3 -C5 alkenylene group or a C6 -C14 arylene group, or a C7 -C14 aralkylene or C8 -C14 aralkenylene bridging member, and A is the equivalent of an anion having one or more negative charges for electrical neutralization of the charge on the triazolium cation.
