@article{oai:kanazawa-u.repo.nii.ac.jp:00010738,
 author = {Kimura, Rumi and Nagano, Tanemasa and Kinoshita, Hideki},
 issue = {11},
 journal = {Bulletin of the Chemical Society of Japan},
 month = {Jan},
 note = {Ethyl N-Boc- and N-Z-α-tosylglycinates were reacted with a variety of aldehydes in the presence of tributylphosphine and a base to afford the corresponding α,β-didehydroamino acid derivatives with high (Z)-selectivity in good yields. Moreover, ethyl (4S)- and (4R)-2-(N-Boc-amino)-4,5-isopropylidenedioxy-2-pentenoates prepared by the present method were converted to (2S, 4S)- and (2R, 4R)-4-hydroxyprolines, respectively.},
 pages = {2517--2525},
 title = {A new synthetic method for the preparation of α,β-didehydroamino acid derivatives by means of a wittig-type reaction. Syntheses of (2S, 4S)- and (2R, 4R)-4-hydroxyprolines},
 volume = {75},
 year = {2002}
}