Thermolysis of suitably substituted

Likewise, 1,4-diazepine 5i-m,83 1,4-thiazepine 5h,83 1,4-oxazepine 5a-g,83 and 1,4-oxazepin-5-one92 derivatives were formed in good yield on thermolysis of suitably substituted dihetera-tricyclo[3.2.0.02,4]heptanes in refluxing toluene or xylene. 

Photolysis and thermolysis of suitably substituted diazirines could be considered an ideal method for the generation of free methylene as well as for alkyl- and dialkylcarbenes. Diazirines are preferred precursors compared to acychc diazo compounds because of their stability and ease of handhng. ... 

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