Khristich, B. I. published the artcileFree-radical hydroxymethylation of benzimidazole, SDS of cas: 7467-35-8, the publication is Khimiya Geterotsiklicheskikh Soedinenii (1982), 1679-81, database is CAplus.
Free radical hydroxymethylation of benzimidazoles I (R = Me, PhCH2, Ph, p-MeOC6H4, p-PhC6H4, R1 = R2 = H; R = Me, R1 = NO2, MeO, R2 = H) to give hydroxymethyl derivatives I (R2 = CH2OH) was carried out by refluxing in aqueous MeOH containing concentrated H2SO4 and (NH4)2S2O8 24 h, or by heating aqueous MeOH containing concentrated H2SO4 and (NH4)2S2O8 in an ampule 7 h at 40-50°, or by refluxing an aqueous MeOH solution containing concentrated H2SO4, AgNO3, and (NH4)2S2O8 3 h. Higher yields were obtained via the last method.
Khimiya Geterotsiklicheskikh Soedinenii published new progress about 7467-35-8. 7467-35-8 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Alcohol, name is (1-Methyl-1H-benzo[d]imidazol-2-yl)methanol, and the molecular formula is C9H10N2O, SDS of cas: 7467-35-8.
Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem