Sind pyrazolin-3,5-dione als vorstufen für carbene geeignet ?
摘要:
Thermolysis of the 1-pyrazoline-3,5-diones 3a,b yields the ketenes 4a,b. Upon matrix irradiation of 3a,b a second molecule of CO is eliminated under formation of the carbenes 5a,b, which finally lead to propene (6) or allene (7).