in acetic acid in boiling glacial acetic acid;;

in acetic acid 95-98°C, in CH3COOH/85percent H3PO4 soln.;

hydrogen in methanol 165 bar H2, 120°C;

triethylamine in dichloromethane Fe complex reacted with HNMe2*HCl and B compd. in presence of Et3N in CH2Cl2;

n-butyllithium; N,N,N',N,-tetramethylethylenediamine in hexane N2-atmosphere; dropwise addn. of BuLi to mixt. of Fe-complex and TMEDA, stirring (room temp., 18 h), addn. of ether, addn. of 2 equiv. of ammonium salt, stirring (room temp., 18 h), refluxing for 10 min; dropwise addn. of H2O, stirring for 15 min, addn. of further H2O, extn. of aq. layer into ether, drying of combined org. layers (MgSO4), concn. (45°C, reduced pressure), chromy. (Al2O3, petroleum ether, ether/petroleum ether, MeOH/ether);

in dichloromethane 40°C;

aluminium trichloride in further solvent(s) in C2H4Cl2;

in acetic acid 95-98°C, in CH3COOH/85percent H3PO4 soln.;

in acetic acid 95-98°C, in CH3COOH/85percent H3PO4 soln.;

formaldehyd in acetic acid in boiling CH3COOH;