tert-Butyl 1-(4-nitrobenzyl)piperidin-4-ylcarbamate

tert-Butyl 1-(4-fluorobenzoyl)piperidin-4-ylcarbamate

tert-Butyl 4-[(2-fluoro-4-nitrophenoxy)methyl]piperidine-1-carboxylate

(S)-tert-Butyl 1-isopropylpyrrolidin-3-ylcarbamate

(S)-tert-Butyl 1-(4-fluorobenzyl)pyrrolidin-3-ylcarbamate

(R)-tert-Butyl 1-(cyclopentylmethyl)pyrrolidin-3-ylcarbamate

(S)-tert-Butyl 1-propionylpyrrolidin-3-ylcarbamate

(R)-tert-Butyl 1-propionylpyrrolidin-3-ylcarbamate

(R)-tert-Butyl 1-(4-fluorobenzoyl)pyrrolidin-3-ylcarbamate

tert-Butyl 1-picolinoylpiperidin-4-ylcarbamate

tert-Butyl 1-(cyclopentylcarbamoyl)piperidin-4-ylcarbamate