Accession Number:

AD0415220

Title:

Photodimers of fumaric and maleic acid derivatives; final report

Descriptive Note:

Semi-annual progress rept. (Final) 1 Oct 60-30 June 63.

Corporate Author:

TULANE UNIV NEW ORLEANS LA

Personal Author(s):

Report Date:

1963-07-01

Pagination or Media Count:

11.0

Abstract:

Direct irradiation of dimethyl fumarate in the solid state was shown to afford a single dimer cis,trans,cis-1,2,3,4-tetracarbomethoxycyclo butane. Isomerization of this dimer to the thermodynamically more stable trans,trans, trans tetraester is readily achieved thermally. Simi lar results were obtained with fumaronitrile and maleic anhydride. Photodimers of fumaric acid derivatives have provided ideal precursors for the synthesis of the novel nonbenzenoid sys tem tetramethylenecyclobutane. Of these, di methylfumarate dimer proved most practical from a synthetic standpoint. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE