49618-47-5Relevant academic research and scientific papers
A ONE POT REACTION INVOLVING HYDROLYSIS-REDUCTION OF BIPHTHALYLIDENE IN AN ALKALINE MEDIUM
Tashiro, Masashi,Sumida, Tsuyoshi,Fukata, Gouki
, p. 657 - 660 (2007/10/02)
The hydrolysis of biphthalylidene (2) in varying alkaline medium afforded selectively 2,2'-dicarboxybenzoin (3) or 5,5'-dihydro-5-oxo-diphthalylidene (4) in good yields depending upon the conditions used.In one pot reaction involving hydrolysis of 2 followed by reduction with Raney-alloys, 4b,10b-dihydrobenzopyranobenzopyrano-6,12-dione (9) was almost selectively obtained in good yields.In the case of the combination of hydrolysis in 10percent KOH aq and Al-Ni alloy reduction, 2,2'-dicarboxybibenzyl (8) yielded in 51percent as a sole product.
