By a two-phase catalytic cyclopropanation of cis-stilbene (I) with chloroform, conc. NaOH and triethbenzylammonium chloride (TEBA). Alternatively the cyclopropanation of (I) can also be performed with bromodichloromethyl(phenyl)mercury (A) in refluxing benzene.
By a two-phase catalytic cyclopropanation of 4,4'-dimethoxy-cis-stilbene (I) with chloroform, conc. NaOH and triethbenzylammonium chloride (TEBA). Alternatively the cyclopropanation of (I) can also be performed with bromodichloromethyl(phenyl)mercury (A) in refluxing benzene.
By a two-phase catalytic cyclopropanation of 4-[2-(dimethylamino)ethoxy]-cis-stilbene (I) with chloroform, conc. NaOH and triethbenzylammonium chloride (TEBA). Alternatively the cyclopropanation of (I) can also be performed with bromodichloromethyl(phenyl)mercury (A) in refluxing benzene.
By a two-phase catalytic cyclopropanation of 4-[2-(diethylamino)ethoxy]-cis-stilbene (I) with chloroform, conc. NaOH and triethbenzylammonium chloride (TEBA). Alternatively the cyclopropanation of (I) can also be performed with bromodichloromethyl(phenyl)mercury (A) in refluxing benzene.
By a two-phase catalytic cyclopropanation of 4-[2-(1-piperidinyl)ethoxy]-cis-stilbene (I) with chloroform, conc. NaOH and triethbenzylammonium chloride (TEBA). Alternatively the cyclopropanation of (I) can also be performed with bromodichloromethyl(phenyl)mercury (A) in refluxing benzene.
By a two-phase catalytic cyclopropanation of 4-methoxy-cis-stilbene (I) with chloroform, conc. NaOH and triethbenzylammonium chloride (TEBA). Alternatively the cyclopropanation of (I) can also be performed with bromodichloromethyl(phenyl)mercury (A) in refluxing benzene.
By a two-phase catalytic cyclopropanation of 4-fluoro-4'-methoxy-cis-stilbene (I) with chloroform, conc. NaOH and triethbenzylammonium chloride (TEBA). Alternatively the cyclopropanation of (I) can also be performed with bromodichloromethyl(phenyl)mercury (A) in refluxing benzene.