A New Synthetic Route to .beta.-2'-Deoxyribosyl-5-Substituted Pyrrolo[2,3-d]pyrimidines. Synthesis of 2'-Deoxycadeguomycin
摘要:
A new and flexible synthetic route to beta-2'-deoxyribosyl-5-substituted pyrrolo[2,3-d]pyrimidines has been developed. Formation of the pyrrole ring is effected by combining sodium N-(4-nitrophenethyl)-glycinate with a differently protected 6-chlorouracil derivative generating a substitution adduct. Heating of his material in acetic anhydride affords the 5-(acetyloxy)pyrrolo[2,3-d]pyrimidine 9 in high yield. Base-mediated removal of the pyrrole protecting group gives free pyrrole 10 which is then glycosylated with 1-chloro-2-deoxy-3,5-ditoluoyl-alpha-D-erythro-pentofuranose (11) using the sodium salt method. The resulting glycosides 15a,b (alpha:beta, 1:4) are readily separated following hydrolysis of the C-5 acetyloxy group. The subsequently derived pure beta-5-(trifluoromethanesulfonyl) derivative 14 undergoes four types of palladium-catalyzed carbon-carbon bond-forming reactions and results in C-5 substituted compounds 15-18. An efficient synthetic route to the pyrrolo[2,3-d]pyrimidine nucleotide analogue, 2'-deoxycadeguomycin (27), is presented. The key transformation involves the conversion of the differentially protected pyrrolo[2,3-d]pyrimidine-2,4-dione base portion in 15 into a protected 2-aminopyrrolo[2,3-d]pyrimidin-4-one 24. An alternative route to 27 was developed which involved prior conversion of the pyrrole-protected precursor 9 into its C-5 triflate derivative 20 followed by palladium-catalyzed carboxylation leading to ester 21. Removal of the pyrrole protecting group and then sodium salt-promoted glycosidation afforded the same beta-2'-deoxyribosyl intermediate 15 as prepared earlier. The stereochemistry of glycosidation was found to be dependent upon the electronic effect of the C-5 substituent on the pyrrole ring.
A New Synthetic Route to .beta.-2'-Deoxyribosyl-5-Substituted Pyrrolo[2,3-d]pyrimidines. Synthesis of 2'-Deoxycadeguomycin
摘要:
A new and flexible synthetic route to beta-2'-deoxyribosyl-5-substituted pyrrolo[2,3-d]pyrimidines has been developed. Formation of the pyrrole ring is effected by combining sodium N-(4-nitrophenethyl)-glycinate with a differently protected 6-chlorouracil derivative generating a substitution adduct. Heating of his material in acetic anhydride affords the 5-(acetyloxy)pyrrolo[2,3-d]pyrimidine 9 in high yield. Base-mediated removal of the pyrrole protecting group gives free pyrrole 10 which is then glycosylated with 1-chloro-2-deoxy-3,5-ditoluoyl-alpha-D-erythro-pentofuranose (11) using the sodium salt method. The resulting glycosides 15a,b (alpha:beta, 1:4) are readily separated following hydrolysis of the C-5 acetyloxy group. The subsequently derived pure beta-5-(trifluoromethanesulfonyl) derivative 14 undergoes four types of palladium-catalyzed carbon-carbon bond-forming reactions and results in C-5 substituted compounds 15-18. An efficient synthetic route to the pyrrolo[2,3-d]pyrimidine nucleotide analogue, 2'-deoxycadeguomycin (27), is presented. The key transformation involves the conversion of the differentially protected pyrrolo[2,3-d]pyrimidine-2,4-dione base portion in 15 into a protected 2-aminopyrrolo[2,3-d]pyrimidin-4-one 24. An alternative route to 27 was developed which involved prior conversion of the pyrrole-protected precursor 9 into its C-5 triflate derivative 20 followed by palladium-catalyzed carboxylation leading to ester 21. Removal of the pyrrole protecting group and then sodium salt-promoted glycosidation afforded the same beta-2'-deoxyribosyl intermediate 15 as prepared earlier. The stereochemistry of glycosidation was found to be dependent upon the electronic effect of the C-5 substituent on the pyrrole ring.
3-Substituted 6-anilinouracils, presently the most promising class of inhibitors of the bacterial DNA polymerase in Gram-positive bacteria, have been prepared by a general and straightforward three-step procedure starting from a readily available 1-benzyloxymethyl-protected derivative of 6-chlorouracil.
[DE] PIPERIDINOURACILE ALS ARZNEIMITTEL ZUR BEHANDLUNG BAKTERIELLER INFEKTIONEN<br/>[EN] PIPERIDINE OURACIL USED AS A MEDICAMENT FOR TREATING BACTERIAL INFECTIONS<br/>[FR] PIPERIDINE OURACILE EN TANT QUE MEDICAMENT POUR TRAITER DES INFECTIONS BACTERIENNES
申请人:BAYER AG
公开号:WO2003072574A1
公开(公告)日:2003-09-04
Die Erfindung betrifft Piperidinouracile und Verfahren zu ihrer Herstellung sowie ihre Verwendung zur Herstellung von Arzneimitteln zur Behandlung und/oder Prophylaxe von Krankheiten, insbesondere von bakteriellen Erkrankungen.
Piperidine ouracil used as a medicament for treating bacterial infections
申请人:Svenstrup Niels
公开号:US20060100224A1
公开(公告)日:2006-05-11
The invention relates to piperidine ouracil and a method for the production thereof in addition to the use thereof in the production of medicaments for treating and/or in the prophylaxis of diseases, especially bacterial diseases.
[EN] PYRIMIDOTRIAZINEDIONES AND PYRIMIDOPYRIMIDINEDIONES AND METHODS OF USING THE SAME<br/>[FR] PYRIMIDOTRIAZINEDIONES ET PYRIMIDOPYRIMIDINEDIONES ET PROCÉDÉS D'UTILISATION
申请人:UNIV MICHIGAN
公开号:WO2010014798A3
公开(公告)日:2010-05-14
A New Efficient Route to 5-Substituted .beta.-2'-Deoxyribosylpyrrolo[2,3-d]pyrimidines. Palladium-Catalyzed Functionalizations of a C-5 Triflate Intermediate
作者:Eric D. Edstrom、Yuan Wei
DOI:10.1021/jo00102a011
日期:1994.11
An efficient synthesis of a beta-2'-deoxyribosyl-5 -[(trifluoromethanesulfonyl)oxy]pyrrolo[2,3-d]pyrimidine- 2,4-dione 9, starting from 6-chlorouracil, is presented along with its subsequent functionalization at C-5 using four types of palladium-catalyzed reactions.