反应详情

1-Cyclopropyl-5-pyridin-2-yl-1H-pyrazole-4-carbaldehyde was prepared from ethyl 3-oxo-3-pyridin-2-yl-propionate and cyclopropyl hydrazine oxalate in the same manner as 5-cyclopropyl-1-isopropyl-1H-pyrazole-4-carbaldehyde (Example 49).