New regiospecific synthesis of the “branched” tri-, penta- & hepta-ribonucleic acids which are formed as the “lariat” in the pre-mRNA processing reactions[Splicing]
作者:X-. Zhou、G. Remaud、J. Chattopadhyaya
DOI:10.1016/s0040-4020(01)89837-9
日期:——
Synthesis of branched triribonucleotides 14 & 19, branched pentaribonucleotides 37 & 38 and branched heptaribonucleotide 41 are reported using the key intermediate 7 or 9. The advantage of using 7 or 9 is that they circumvent the need for complementary protecting groups for the 2'-hydroxyl functions and for the internucleotidyl phosphodiesters in order to introduce the second phosphodiester bond specifically
Disclosed is a novel nucleoside derivative showing anti-virus activities such as an anti-herpes activity and an anti-HIV activity. The nucleoside derivative has the formula (1-1) or (1-2):
wherein A is a nitrogen atom-containing heterocyclic ring which is linked through nitrogen atom thereof; B is a hydrogen atom, a halogen atom, an azido group, an alkyl group, etc.
Medicament for treating human immunodeficiency virus
申请人:NIPPON CHEMIPHAR CO., LTD.
公开号:EP0624372A2
公开(公告)日:1994-11-17
Disclosed is a medicament for treating human immunodeficiency virus containing a novel nucleoside derivative. The nucleoside derivative has the formula (1-1) or (1-2):
wherein A is a nitrogen atom-containing heterocyclic ring which is linked through nitrogen atom thereof; B is a hydrogen atom, a halogen atom, an azido group, an alkyl group, etc.
公开了一种治疗人类免疫缺陷病毒的药物,其中含有一种新型核苷衍生物。该核苷衍生物具有式(1-1)或(1-2):
其中 A 是通过氮原子连接的含氮杂环;B 是氢原子、卤素原子、叠氮基团、烷基等。
A New Method for Removal of Modified Trityl and Pixyl Groups by Use of an Acid Species Generated by Reaction of Diethyl Oxomalonate with Methanol
作者:Mitsuo Sekine
DOI:10.1080/15257779408012160
日期:1994.7
Diethyl oxomalonate (DEOM) was found to exhibit unique properties as a new type of detritylating reagent in the presence of methanol. A variety of deoxyribonucleoside derivatives protected with modified trityl groups were allowed to react with DEOM. The ease of detritylation highly depended on the basicity of protected bases of adenine, guanine and cytosine. Inhibitory effects of various amines possessing the pKa values between 0.79-10.87 on the present detritylation were studied. Several mechanistic considerations were alsb discussed on the basis of H-1 and C-13 NMR studies of the DEOM-Methanol adduct.
Kwiatkowski, M.; Chattopadhyaya, J., Acta chemica Scandinavica. Series B: Organic chemistry and biochemistry, 1984, vol. 38, # 8, p. 657 - 672