No abstract

The ( + )a d ( -) -o-ToZyZ-p-toZyZcarbinoZ~.The ( +)and ( -)-o-Tolyl-p-tolylcrbinols.

2-Acety1, 2-cyano-, and 2-nitro-2-phenylazopropionic acid derivatives suffer cleavage of the phenylazo-grouping on treatment with boron trifluoride, giving benzenediazonium tetrafluoroborate and the corresponding difluoroboron propionic acid derivative ; 2-cyano-or 2-nitro-2-phenylazoisobutyronitrile and the corresponding amides behave similarly. but 1 -phenylazo-2-naphthoI gives a difluoroboron salt, and 2-phenylazo(diphenylmethyl)acetate is cyclised to 1.3-diphenylindazole on treatment with boron trifluoride. Acyl-2-phenylazopropionates suffer loss of the acyl grouping during attempted ketonic carbonyl condensation reactions, with conversion into corresponding phenylhydrazones ; new examples, broadening the scope of the Japp-Klingemann reaction, are described. ' Petroleum ' refers to the fraction of boiling range 40-60";' boron trifluoride ' refers to the diethyl ether complex.2-Substituted Propionic Acid Derivatives.-Ethyl 2-

No abstract