Sonogashira coupling and cyclization reactions on alumina: a route to aryl alkynes, 2-substituted-benzo [b] furans and 2-substituted-indoles

~90%

~94%

~89%

~%

~56%

~49%

~%

~%

~%

~%

~55%

~%

~80%

~%

~50%

~48%

~93%

~%