Assertion: calcium carbide | /r/CapableOf | afford various substituted pyrazoles
Facets:
value: in good yields with high regioselectivities
type: OTHER
Source sentences:
text: Under transition-metal-free conditions, calcium carbide was used as the acetylide source to react with a wide range of N-tosylhydrazones derived from aldehydes or ketones, affording various substituted pyrazoles in good yields with high regioselectivities.