Methyl-substituted fluorine-containing cyclobutenes. Establishment of the HF [high frequency] coupling constants between a vinylic methyl group and the ring fluorines
JD Park, TS Croft
文献索引：Park,J.D.; Croft,T.S. Journal of Organic Chemistry, 1973 , vol. 38, p. 4026 - 4028
The thermal codimerization of 1, l-dichloro-2, 2-difluoro-ethylene and 2-chloropropene would be predicted'to produce 1-methyl-1, 2, 2-trichloro-3, 3-difluorocyclobutane (71, an assignment borne out by the nmr and mass spectra reported in the Experimental Section. Dechlorination of 7 with zinc gave 8 and a dehydrohalogenation induced with triethylamine produced 9. In both cases, the nmr spectra contained a coupling value of about 3.2 Hz ...
