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公开(公告)号：US3616361A
公开(公告)日：1971-10-26
申请号：US3616361D
申请日：1969-07-28
Applicant: IBM
Inventor： PICONE JANE M , SRINIVASAN RANGASWAMY
CPC classification number: C07C45/60 , Y10S204/912 , C07C47/293 , C07C47/37
Abstract: THE CYCLOBUTANE CARBOXALDEHYDES THUS PRODUCED CAN BE UTILIZED AS HIGH-ENERGY FUELS. They can also be used as monomeric starting materials for preparing rigid polymers of the type shown and described in the publication to W. W. Moyes, et al., Journal Polymer Science, 1, 29 (1963).
Cyclobutane carboxaldehydes having the general formula: WHERE R1 and R2 can be H, CH3, OC2H5 and CHO, are prepared from a 3,4 dihydro-(2H)-pyran and its derivatives. A pyran derivative is exposed to actinic radiation for a time sufficient to cause the photoisomerization thereof into the corresponding cyclobutane carboxaldehydes. The reaction may be characterized as:
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