SYNTHESIS OF 3′-THIOAMIDO-MODIFIED 3′-DEOXYTHYMIDINE-5′-TRIPHOSPHATES AND THEIR USE AS CHAIN TERMINATORS IN SANGER-DNA SEQUENCING
作者:K. Schwarzer、C. Wojczewski、J. W. Engels
DOI:10.1081/ncn-100002450
日期:2001.3.31
The thioamide derivatives 3'-deoxy-5'-O-(4,4'-dimethoxytrityl)-3'-[(2-methyl-1-thioxo-propyl)amino]thymidine 1 and 3'-deoxy-5'-O-(4,4'-dimethoxytrityl) -3'- 6-[(9H-(fluo-ren-9-ylmethoxy)carbonyl] -amino}-1-thioxohexyl}amino} thymidine 2 were synthesized by regioselective thionation of their corresponding amides 7 and 8 with 2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane- 2,4-disulfide (Lawesson's reagent). The thioamides were converted into the corresponding 5'-triphosphates 3 and 4. Compound 3 was chosen for DNA sequencing experiments and 4 was further labelled with fluorescein.