N2-Benzoyl-2',3',5'-tri-O-TBDMS-β-D-ribofuranosyl-guanosine 、
2,2,6,6-tetramethylpiperidinodichlorophosphine 在
N,N-二异丙基乙胺 作用下,
以48%的产率得到3-[(2R,3R,4R,5R)-3,4-Bis-(tert-butyl-dimethyl-silanyloxy)-5-(tert-butyl-dimethyl-silanyloxymethyl)-tetrahydro-furan-2-yl]-6-phenyl-8-(2,2,6,6-tetramethyl-piperidin-1-yl)-3H-7-oxa-1,3,4,5,8a-pentaaza-8-phospha-cyclopenta[b]naphthalen-9-one