... Please enable JavaScript to use all the features on this page. Tetrahedron Letters. Volume 24, Issue 39, 1983, Pages 4199–4202. ... Abstract. α-Cyclohexylidene-cyclobutylidene, a new ambiphilic carbene, undergoes addition to 1,1-diethoxyethylene and t. butylfumarate and insertion into activated carbon-hydrogen bonds. Références. 1; A. Tubul, M. Bertrand et C. Ghiglione, J. Chem. Research, sous presse . 2; RA Moss, CB Mallon, CT Ho; J. Amer. Chem. ...