p. 5456 - 5458
(2008/01/27)p. 6497 - 6499
(2007/10/03)p. 1585 - 1590
(2007/10/03)dibenzyl hydrogen phosphite
dibenzyl methylphosphonate
methylphosphonic acid dichloroanhydride
methanol
benzyl alcohol
(3-{(2R,3S)-1-(tert-Butyl-dimethyl-silanyl)-3-[(R)-1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-4-oxo-azetidin-2-yl}-2-oxo-propyl)-phosphonic acid benzyl ester methyl ester
{3-[(2S,3R)-3-((S)-1-Hydroxy-ethyl)-4-oxo-azetidin-2-yl]-2-oxo-propyl}-phosphonic acid benzyl ester methyl ester
[(5R,6S)-6-((R)-1-Hydroxy-ethyl)-3,7-dioxo-1-aza-bicyclo[3.2.0]hept-2-yl]-phosphonic acid benzyl ester methyl ester
[(5R,6S)-6-((R)-1-Hydroxy-ethyl)-3-methoxy-7-oxo-1-aza-bicyclo[3.2.0]hept-2-en-2-yl]-phosphonic acid benzyl ester methyl ester
(3-{(2S,3R)-3-[(S)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-4-oxo-azetidin-2-yl}-2-oxo-propyl)-phosphonic acid benzyl ester methyl ester