Synthesis and photochemical properties of new photoremovable protecting groups for nucleobases are described. Four caged 2'-deoxycytidines (dCs) were synthesized, and their photochemical properties were measured under simulated physiological conditions. Two new coumarin-caged dCs show better photochemical and photophysical properties than those of the caged dCs having previously reported caging groups.

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Benzofuran derivatives R 0070 2,2'-Isopropylidenebis[(4S,5R)-4,5-di(2-naphthyl)-2-oxazoline] Ligand for Asymmetric Cyclization-Carbonylation of meso-2-Alkyl-2-propargylcyclohexane-1,3-diols-[development of the NABOX ligand by detailed study of ligand structure-enantioselectivity relationship]. -(KATO*, K.; MATSUBA, C.; KUSAKABE, T.; TAKAYAMA, H.; YAMAMURA, S.; MOCHIDA, T.; AKITA, H.; PEGANOVA, T. A.; VOLOGDIN, N. V.; GUSEV, O. V.; Tetrahedron 62 (2006) 42, 9988-9999; Sch. Pharm. Sci., Toho Univ., Funabashi, Chiba 274, Japan; Eng.) -Mischke 05-104