Shim, Young Key published the artcileNew synthetic route to 1,4-dihydropyridine monoacid derivatives, Quality Control of 101-98-4, the publication is Taehan Hwahakhoe Chi (1988), 32(2), 144-8, database is CAplus.
A novel synthetic route to 1,4-dihydropyridine mono carboxylic acid derivatives is described. Allyl Me 2,6-dimethyl-4-(3′-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate I (R = allyl) was treated with Pd(OAc)2 in dioxane for 30 min at 100° C with reflux to give the mono acid I (R = H; II) in 94% yield. II was converted to Nicardipine (I, R = CH2CH2NMeCH2Ph) and its derivatives in 70∼85% yield.
Taehan Hwahakhoe Chi published new progress about 101-98-4. 101-98-4 belongs to alcohols-buliding-blocks, auxiliary class Amine,Benzene,Alcohol, name is 2-(Benzyl(methyl)amino)ethanol, and the molecular formula is C10H10CoF6P, Quality Control of 101-98-4.
Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts