Dibenzo oxepin-5 -ones

Aminomethyl)biphenyl-2-carboxylic acid (70) and -acetic acid (69) have been prepared from dibenzo-substituted oxepin-2-one 66 by potassium phthalimide ring opening. Further Arndt-Eistert homologation of 67 provided 68.[104]... 

Reaction of 117/-dibenzo[7/]thiepin-10-ones 135a and 135b with chloroacetone in the presence of base in dimethyl sulfoxide (DMSO) resulted in formation of O-alkylation products 136a and 136b in 23% and 8% yields, respectively (Equation 18) <2006JHC749>. On the other hand, oxepine analogs preferentially gave G-alkylation products. 

Novel classes of fused pyrroles, dibenzo[2,3 6,7]oxepino[4,5- ]pyrroles and dibenzo[2,3 6,7]thiepino[4,5- ]pyrroles, were prepared by the intermolecular cyclocondenation of dibenzo[2,3 6,7]oxepin-5-ones and dibenzo[2,3 6,7]thiopin-5-ones with (dimethylhydrazono)acetaldehyde <07JHC1129>. 

Dibenzo[fcj/ oxepin-10(l lfi)-one and dibenzo[6 thiepin-10(llH)-one as useful synthons in the synthesis of various dibenzo[e,/j]azulenes 12JHC243. 

C29HH0KNO10S, Dibenzo-30-crown-10 potassium thiocyanate, 46B, 343 C29H112O8, (E)-5,7-Di-t-butyl-3-(3 , 5 -di-t-butyl-5 -methoxy-2 , 5 -dihydrofuran-2 -ylidene)benzofuran-2(3H)-one, 44B, 313 C30H20O, 2,5-Diphenylphenanthro[9,10-b]oxepin, 46B, 343 C30H20O8, 4-Phenoxy-3,4,6-triphenyl-1H,4H-furo[3,4-c]furan-1-one, 44B, 85... 

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