234754-44-0Relevant articles and documents
Preparation of lithium 5-lithiomethyl-3-methylpyrazole-1-carboxylate and its reaction with α-oxoketene dithioacetals: A new general method for substituted and annelated pyrazolo[1,5-a]pyridines
Kishore, Kaushal,Reddy,Suresh,Ila,Junjappa
, p. 7645 - 7652 (2007/10/03)
5-Methylpyrazole derivative 1 is metallated at the C-5 methyl carbon atom to form lithium 5-lithiomethyl-3-methylpyrazole-1-carboxylate 3 which on reaction with α-oxoketene dithioacetals 4a-d, 12a-c and 15a-b yields substituted and annelated pyrazolo[1,5-