... Volume: Page: Digital Object Identifier (DOI). ... We have noted that the same diazo product was also obtained in Ungváry's study of Co 2 (CO) 8 -catalyzed carbonylation of EDA with CO.(8a). ... 1, Pd(PPh 3 ) 4 (5), PhMe, 7, 50. 2, Pd(PPh 3 ) 4 (5), THF, 7, 32. ...