Istituto Guido Donegani

Enichem S.p.a

Franco Rama

Paolo Piccardi

Pietro Massardo

Franco Bettarini

Goffredo Rosini

Vincenzo Caprioli

Rossella Serra

Giovanni Confalonieri

A procedure is described for the preparation of compounds having a bicyclo[3.2.0]heptenonic structure corresponding to the formula: ##STR1## wherein R.sub.1 and R.sub.2, the same or different are hydrogen or a C.sub.1 -C.sub.4 alkyl. The compounds corresponding to formula (I) can be used as intermediates or precursors of pheromones, prostaglandins and antibiotics.

Procedure for the preparation of bicyclo [3.2.0]hept-2-en-7-ones

Compounds are disclosed having formula: ##STR1## wherein: R is Cl, F; R.sub.1 is H, Cl, F; R.sub.2 and R.sub.5, equal to or differing from each other, are H, halogen, alkyl C.sub.1 -C.sub.4 ; R.sub.3 and R.sub.4, equal to or differing from each other, are: H, halogen, alkyl, haloalkyl, alkoxy, haloalkoxy, alkenyl, haloalkenyl, alkenyloxy, haloalkenyloxy or alkynyl; Z is O, S or a group NR.sub.7, wherein R.sub.7 is alkyl C.sub.1 -C.sub.3 or H; Y is alkylene C.sub.2 -C.sub.4, haloethylene or haloethenyl; R.sub.6 is alkyl C.sub.1 -C.sub.4, haloalkyl C.sub.1 -C.sub.4, alkenyl C.sub.3 -C.sub.4, haloalkenyl C.sub.3 -C.sub.4, cycloalkyl C.sub.3 -C.sub.4, halocycloalkyl C.sub.3 -C.sub.4 or cycloalkenyl C.sub.3 -C.sub.4. The compounds having formula (I) are endowed with an elevated insecticide activity, which shows itself chiefly against insect larvae and eggs.

Benzoyl-ureas having insecticide activity

There is disclosed a process for preparing polyhalogenated carbinols having formula: ##STR1## by reacting a compound having formula: ##STR2## with a system consisting of a compound having formula: ##STR3## and of a divalent metal or of a metal salt, in protic dipolar solvents, in which formulae

Process for preparing polyhalogenated carbinols

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Varese, Italy

Franco Rama