The Syntheses of Purine and Pyrimidine Secoribo-nucleosides: Acyclo-uridine Derivative of Cyclophosphamide
作者:Maryam Zakerinia、Hady Davary、Gholam H. Hakimelahi
DOI:10.1002/hlca.19900730418
日期:1990.6.20
The synthesis of secoribo-nucleoside analogues is described. Compounds 4 and 5 possess interesting antiviral effects in vitro. A procedure is also developed for the conversion of acyclo-uridine nucleoside 7 to a novel derivative of cyclophosphamide 8.
Biomimetic polyorganosiloxanes: model compounds for new materials
作者:Gabriele Kociok-Köhn、Mary F. Mahon、Kieran C. Molloy、Gareth J. Price、Timothy J. Prior、Douglas R. G. Smith
DOI:10.1039/c4dt00554f
日期:——
(Me3SiO)2(Me)Si(CH2)4T (16), (Me3SiO)2(Me)Si(CH2)4A (17) (both from 13). 10 reacts with thymine to give a mixture of the pyrimidocyclophane cyclo-T-N,N-[(CH2)4(Me)2Si]2O (19) and [T(CH2)4Si(Me)2]2O (20), while cytosine reacts similarly to form cyclo-C-N,N-[(CH2)4(Me)2Si]2O (21; as an imine) and [C(CH2)4Si(Me)2]2O (22); adenine only generates [A(CH2)4Si(Me)2]2O (18) in an analogous synthesis. Using a related
Er(OTf)<sub>3</sub> as a Valuable Catalyst in a Short Synthesis of 2′,3′-Dideoxy Pyranosyl Nucleosides via Ferrier Rearrangement
作者:Antonio Procopio、Renato Dalpozzo、Antonio De Nino、Monica Nardi、Manuela Oliverio、Beatrice Russo
DOI:10.1055/s-2006-942443
日期:2006.8
Er(OTf) 3 is a useful catalyst for the Ferrier rearrangement furnishing 2',3'-dideoxy pyranosyl nucleosides easily by means of cleaner reaction profiles, short reaction times, mild reaction conditions, good stereoselectivity, and good recoverability of the commercially available catalyst.
Direct heptafluoropropylation of purines with bis(heptafluorobutyryl) peroxide
作者:Masakazu Nishida、Shozo Fujii、Hiroshi Kimoto、Yoshio Hayakawa、Hideo Sawada、Louis A. Cohen
DOI:10.1016/s0022-1139(00)80492-3
日期:1993.11
Some silylated purines react with bis(perttuorobutyryl) peroxide to provide ring-C3F7 derivatives. The introduction of the C3F7 group occurs predominantly at C-8: 6-methoxypurine also gave the C-2 isomer in isolable yield. Replacement of the 6-amino group of adenine with dimethylamino or methoxy improved the yields of the C3F7 derivatives.
一些甲硅烷基化的嘌呤与双(过氧叔丁酰)过氧化物反应以提供环-C 3 F 7衍生物。C 3 F 7基团的引入主要发生在C-8:6-甲氧基嘌呤也可分离地得到C-2异构体。用二甲基氨基或甲氧基取代腺嘌呤的6-氨基基团改善了C 3 F 7衍生物的产率。
Stereocontrolled synthesis of α-2′-deoxyribonucleosides
作者:Zhiwei Wang、Carmelo J Rizzo
DOI:10.1016/s0040-4039(97)10251-9
日期:1997.11
A stereocontrolled synthesis of α-2′-deoxynucleosides has been achieved. Our synthetic strategy involves the use of a benzoyl group at the 2-position of arabinose as a directing group for Vorbrüggen glycosylation and a deoxygenation precursor.