1,8-diazabicyclo[5.4.0]undec-7-ene in butan-1-ol under Ar atm. mixt. Co(OAc)2*4H2O, naphthalocyanine, 1,8-diazabicyclo(5.4.0)undec-7-ene and 1-butanol was refluxed for 20 h; react. mixt. was diluted with MeOH and H2O, ppt. was filtered and chromed. on Al2O3-V (toluene), vac.-dried at room temp.;