Cinnamyliden acetic acid

This latter, like all malonic acid derivatives, loses carbon dioxide on heating, and yields cinnamylidene acetic acid (see Preparation 427). For another and similar condensation brought about by amines, see Reaction XLV. 

Incorporation of light-sensitive groups as molecular switches in the polymer networks enabled the development of light-induced SMPs. In this way, SME could be induced independently from any temperature effect [36]. Instead of increasing the sample s temperature, light of different wavelength ranges was used for the fixation of the temporary and the recovery of the permanent shape. CA or cinnamyliden acetic acid (CAA) have been used as photosensitive molecular switches on the molecular level as they are able to form covalent crosslinks with each other in a... 

A number of plant toxins are cyclic members of this series. Huratoxin is the piscicidal constituent of Hura crepitans (Euphorbiaceae). X-Ray analysis showed 34 jjg structure [117 R - H, R = CH CH-CH CH(CH2)8Me] was related to daphnetoxin (117 R = H, R = Ph). Mezerein (117) which is the toxic principle of Daphne mezereum, containsthe cinnamylidene acetic ester (R ) and orthobenzoate (R ) units. Ingenol (118), as its 3-hexadecanoic acid ester, is an irritant isolated from Euphorbia ingens Its structure was determined by X-ray analysis of the triacetate. 

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