Catalytic preparation of formaldehyde condensates

Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

568458, C07C 4572

Patent

active

052986683

ABSTRACT:
Arycolaldehyde, glyceraldehyde, C.sub.4 - and C.sub.5 -sugars or mixtures thereof are prepared in a self-condensation of formaldehyde by reacting formaldehyde or a formaldehyde donor in the presence of a mesoionic catalyst of the formula ##STR1## wherein X is nitrogen or CR.sup.3, Y is sulfur or selenium or NR.sup.4, and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 can be identical or different and each can represent an aliphatic, aryl, aralkyl or heteroaryl group which is unsubstituted or which bears substituents which have only a negligible effect on the catalytic activity of said mesoionic catalyst, with the proviso that R.sup.2 together with R.sup.4 can form a C.sub.2 -C.sub.5 -alkylene or alkenylene bridge or a C.sub.6 -C.sub.14 -arylene bridge, and wherein R.sup.5 is hydrogen, the hydroxymethyl group -CH.sub.2 OH or the hydroxymethylhydroxymethyl group --CH(OH)(CH.sub.2 OH).

REFERENCES:
patent: 2224910 (1940-12-01), Hanford et al.
patent: 3865850 (1975-02-01), Merger
patent: 4615970 (1986-10-01), Kojima et al.
patent: 5144088 (1992-09-01), Salek et al.
Tetrahedron Letters, vol. pp. 4517-4520 (1980).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Catalytic preparation of formaldehyde condensates does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Catalytic preparation of formaldehyde condensates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalytic preparation of formaldehyde condensates will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-793491

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.