Keiko Nasu

Reaction of ethyl 3-ethoxymethylene-2,4-dioxovalerate and ethyl ethoxymethyleneoxaloacetate with 3-aminopyrazole analogs. Synthesis and chemistry of 3,6,7-trisubstituted pyrazolo[1,5-a]pyrimidine derivatives†

Reactions of Ethyl 3-Ethoxymethylene-2, 4-dioxovalerate and Ethyl Ethoxymethyleneoxaloacetate with Indole Analogs

Pyrolysis of Benzyl 2-Oxazolecarbamates and Benzyl 4-Alkylallophanates

Ring Transformations of 6H-Cyclopropa [e] pyrazolo [1,5-a] pyrimidine. III. Synthesis and X-Ray Crystal Structure Determination of a 1-Pyrazol-3-ylpyrrole-2-carboxylic Acid

Synthesis and Reactions of Ethyl 6-Acetyl-2, 3-diphenylimidazo [1, 2-a] pyrimidine-5-carboxylate and Related Compounds

Ring transformation of 6H-cyclopropa[e]pyrazolo[1,5-a]pyrimidine. IV (1). Reduction and reaction of 5a-acetyl-6a-ethoxycarbonyl-5a,6a-dihydro-6H-cyclopropa[e]pyrazolo[1,5-a]pyrimidine-3-carbonitriles with primary amines

Synthesis of 4H-pyrazolo[1,5-a][1,3]diazepine

Trifluoroacetylation and Subsequent Pyrolysis of 2-Amino-2-oxazolines

Ring transformations of 6H-cyclopropa(5a,6a)pyrazolo(1,5-a)pyrimidine. II. Reaction of 5a-acetyl-6a-carbethoxy-5a,6a-dihydro-6H-cyclopropa(5a,6a)pyrazolo(1,5-a)pyrimidine-3-carbonitriles with N-methylaniline.

Ring transformation of 6H‐cyclopropa[e]pyrazolo[1,5‐a]pyrimidine. VI. Substituent effect of 6‐substituted 5a‐acetyl‐6a‐ethoxycarbonyl‐5a,6a‐ dihydro‐6H‐cyclopropa[e]pyrazolo[1,5‐a]pyrimidine‐3‐carbonitriles