A New Stereospecific Synthesis of 1,2,4-Trideoxy-1,4-Imino-D-Erythro-Pentitol
摘要:
1,2,4-Trideoxy-1,4-imino-D-erythro-pentitol [(2R,3S)-3-hydroxy-2-hydroxymethylpyrrolidine] (4) was synthesised from 2,5-di-O-tosyl-D-ribono-1,4-lactone in 42 % overall yield. The hey steps were deoxygenation at C-2 and a stereospecific inversion of the configuration at C-4. Compound 4 inhibited alpha-D-glucosidase (K-i = 25 mu M) and beta-D-glucosidase (K-i = 80 mu M).
A New Stereospecific Synthesis of 1,2,4-Trideoxy-1,4-Imino-D-Erythro-Pentitol
摘要:
1,2,4-Trideoxy-1,4-imino-D-erythro-pentitol [(2R,3S)-3-hydroxy-2-hydroxymethylpyrrolidine] (4) was synthesised from 2,5-di-O-tosyl-D-ribono-1,4-lactone in 42 % overall yield. The hey steps were deoxygenation at C-2 and a stereospecific inversion of the configuration at C-4. Compound 4 inhibited alpha-D-glucosidase (K-i = 25 mu M) and beta-D-glucosidase (K-i = 80 mu M).
A New DNA Building Block, 4′-Selenothymidine: Synthesis and Modification to 4′-Seleno-AZT as a Potential Anti-HIV Agent
作者:Varughese Alexander、Won Jun Choi、Jeongha Chun、Hea Ok Kim、Ji Hye Jeon、Dilip K. Tosh、Hyuk Woo Lee、Girish Chandra、Jungwon Choi、Lak Shin Jeong
DOI:10.1021/ol1005906
日期:2010.5.21
The first synthesis of 4′-selenothymidine (1), a novel DNAbuildingblock, and 4′-seleno-AZT (2) was accomplished from 2-deoxy-d-ribose via stereoselective formation of 2-deoxy-4-seleno-d-furanose 17 and a Pummerer-type base condensation as key steps. 4′-Selenothymidine (1) was discovered to adopt the same 2′-endo/3′-exo conformation as thymidine, which is unusual in that 4′-selenouridine has the opposite