... Download full text in PDF. Tetrahedron Letters,Vo1.23,No.50,pp 5287-5290,1982 0040-4039/82/505287-04$03.00/0 Printed in Great Britain 982 Pergamon Press Ltd. A New Type of Protection Mode for the Guanine Residue by Using 1,2-Diisobutyryloxyethylene Group Mitsuo Sekine, Jun-ichi Matsuzaki, and Tsujiaki Hata* Department of Life Chemistry, Tokyo Institute of Technology, Nagatsuta, Midoriku, Yokohama 227, Japan Summary: A new protecting ...
[McClelland, Robert A.; Kanagasabapathy; Banait, Narinder S.; Steenken, Steen Journal of the American Chemical Society, 1991 , vol. 113, # 3 p. 1009 - 1014]
![3-((2R,4S,5R)-5-((bis(4-methoxyphenyl)(phenyl)methoxy)methyl)-4-((bis(phenylthio)phosphoryl)oxy)tetrahydrofuran-2-yl)-5-isobutyryl-9-oxo-5,6,7,9-tetrahydro-3H-imidazo[1,2-a]purine-6,7-diyl bis(2-methylpropanoate)结构式](https://image.chemsrc.com/caspic/339/85562-01-2.png)
![3-((2R,4S,5R)-4-((bis(phenylthio)phosphoryl)oxy)-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-isobutyryl-9-oxo-5,6,7,9-tetrahydro-3H-imidazo[1,2-a]purine-6,7-diyl bis(2-methylpropanoate)结构式](https://image.chemsrc.com/caspic/225/85562-04-5.png)
![O-((2R,3S,5R)-2-((bis(4-methoxyphenyl)(phenyl)methoxy)methyl)-5-(6,7-dihydroxy-5-isobutyryl-9-oxo-5,6,7,9-tetrahydro-3H-imidazo[1,2-a]purin-3-yl)tetrahydrofuran-3-yl)S,S-diphenyl phosphorodithioate结构式](https://image.chemsrc.com/caspic/377/85562-00-1.png)