tert-butyl N-methyl-N-prop-2-ynylcarbamate

tert-butyl N-(3-trimethylsilylprop-2-ynyl)carbamate

tert-butyl N-(3-pyridin-3-ylprop-2-ynyl)carbamate

tert-butyl N-[3-(4-iodophenyl)prop-2-ynyl]carbamate

1,4-bis[3-(tert-butoxycarbonyl)aminoprop-1-ynyl]benzene