87841-16-5Relevant academic research and scientific papers
Hydrated Oxocarbons, II. Preparation of a New Class of Thermochromic Boron Heterocycles from Octahydroxycyclobutane or Dihydroxybutenedioic Acid
Yalpani, Mohamed,Koester, Roland
, p. 3332 - 3337 (2007/10/02)
The reaction of octahydroxycyclobutane (2) with activated triethylborane gives a low yield of the thermochromic 2,6-diethyl-1,3,5,7-tetraoxa-2,6-dibora-4,8-octalindione (5b) by ring cleavage of 2.Additional examples of this novel class of compounds have also been prepared directly by reacting dihydroxyfumaric acid (6) with various alkyl- or arylboranes.With the exception of the tert-butyl- (5f) and the aryl derivatives 5l,m the new compounds 5 undergo a temperature dependent colour change (yellow/colourless) in the solid state.The thermochromic transition temperature Tth depends on the substituents and lies between -5 deg C and 150 deg C.
