CAS: 68858-20-8; Fmoc-Val-Oh

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84624-17-9 126727-02-4 262361-60-4

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N-(9-Fluorenylmethoxycarbonyl)Valine 1,1-Dimethylallyl Ester置于四(三苯基膦)钯 N-甲基吗啉体系中,用 四氢呋喃 作为反应溶剂,以82%的收率获得产物fmoc-L-缬氨酸
参考文献:作为羧酸保护基的1,1-二甲基烯丙基酯的常规合成方法.
标题:作为羧酸保护基的1,1-二甲基烯丙基酯的常规合成方法.
摘要:[反应:请参见文本]通过两步将羧酸高收率转化为其1,1-二甲基烯丙基(dma)酯.钯催化的dma酯的脱保护显示与叔丁基,苄基和fmoc保护基相容,并且fmoc的脱保护可以在dma酯存在下选择性进行.dma酯还显示出对亲核攻击的抵抗力,这表明当需要避免酸性脱保护条件时,它们可作为叔丁基酯的替代品.
DOI:10.1021/ol0476117

专利信息

专利号:WO-9837078-A1
优先权日:1997-02-20
标题 :Solid phase and combinatorial synthesis of substituted thiophenes and of arrays of substituted thiophenes
发明人：DOERWALD FLORENCIO ZARAGOZA
权利人:NOVO NORDISK AS
摘要:A solid phase method for the synthesis of a plurality of differently substituted thiophenes with a wide variety of side-chain substituents as compounds of potential therapeutic interest. The thiophenes are prepared by reaction of a substrate-bound primary or secondary amine with a thiophosgene equivalent and reaction of the resulting intermediate with an acceptor-substituted acetonitrile in the presence of a base. Alkylation with an appropriate alkyl halide, followed by Thorpe-Ziegler-cyclization yields differently substituted, support-bound 3-aminothiophenes. These may be screened on the substrate or cleaved from the substrate and then screened in solution. Alternatively, the resin-bound 3-amino thiophenes or the synthetic intermediates can be subjected to further synthetic transformations (N-acylation, reduction) on the support, which permits the preparation of further therapeutically interesting compounds. The efficient synthesis of a wide variety of thiophenes using automated synthesis technology of the present method makes these compounds attractive candidates for the generation and rapid screening of diverse thiophene-based libraries. The method disclosed here provides an easy and fast access to highly diverse heterocyclic compounds of therapeutic interest, amenable to automatization.

专利号:WO-9740025-A1
优先权日:1996-04-19
标 题 :Solid phase and combinatorial synthesis of substituted 1,2,3-triazoles and of arrays of substituted 1,2,3-triazoles
发明人：DOERWALD FLORENCIO ZARAGOZA
权利人:NOVO NORDISK AS; DOERWALD FLORENCIO ZARAGOZA
摘要:A solid phase method for the synthesis of a plurality of differently substituted 1,2,3-triazoles with a wide variety of side-chain substituents as compounds of potential therapeutic interest. The 1,2,3-triazoles are prepared by acylation of a substrate-bound primary or secondary amine with a 3-oxoalkanoic acid and reaction of the resulting amide with a primary amine under dehydrating conditions to give an enamine. Treatment of this substrate-bound enamine with a sulfonyl azide in the presence of a base gives the corresponding 1,2,3-triazoles. These may be screened on the substrate or cleaved from the substrate and then screened in solution. The efficient synthesis of a wide variety of 1,2,3-triazoles using automated synthesis technology of the present method makes these compounds attractive candidates for the generation and rapid screening of diverse triazole-based libraries. The method disclosed here provides an easy and fast access to highly diverse heterocyclic compounds of therapeutic interest, amenable to automatization.

专利号:US-2013267680-A1
优先权日:2010-09-15
标题:Total chemical synthesis of ubiquitin, ubiquitin mutants and derivatives thereof
发明人：OVAA HUIB; EL OUALID FARID; MERKX REMCO NICOLAAS SEBASTIAAN MICHEL
权利人:OVAA HUIB; EL OUALID FARID; MERKX REMCO NICOLAAS SEBASTIAAN MICHEL; STICHTING HET NL KANKERINST
摘要:The present invention relates to the field of total chemical synthesis of ubiquitin and related peptides. More in particular, a method is provided of solid phase synthesis of ubiquitin, ubiquitin mutants and derivatives thereof. It was the object of the present invention to provide an approach for the total chemical synthesis of ubuiqitin, which allows for the chemical synthesis of virtually any Ub mutant and giving high overall efficiency and purity. The present inventors have surprisingly found that this object can be realized with a method relying on incorporation of special amino acid building blocks. This approach was found to allow for exceptionally high yields of up to 14% and to provide an synthetic entry into virtually any ubiquitin derivative.

专利号:US-2023242581-A1
优先权日:2020-06-17
标题:Synthesis of a guanylate cyclase agonist by fragments based approach
发明人：SAMBASIVAM GANESH; KASTURCHAND GODHA ATUL; VENKATA BHAGYARAJ ARETI; ANNADURAI SATHYA; VEERANJANEYULU AVULA; VASANTRAO GADAKH AMOL; S JADHAV DIPAK
权利人:ANTHEM BIOSCIENCES PRIVATE LTD
摘要:The present invention provides a process for the synthesis of Plecanatide, a guanylate cyclase agonist. The process involves convergent synthesis with compounds, i.e., fragment of peptides followed by cyclization. The method provides high yield of Plecanatide with less impurities.

专利号:US-6136984-A
优先权日:1996-04-22
标 题 :Solid phase and combinatorial synthesis of substituted thiophenes and of arrays of substituted thiophenes
发明人：DOERWALD FLORENCIO ZARAGOZA
权利人:NOVO NORDISK AS
摘要:A solid phase method for the synthesis of a plurality of differently substituted thiophenes with a wide variety of side-chain substituents as compounds of potential therapeutic interest is disclosed. The thiophenes are prepared by acylation of a substrate-bound primary or secondary amine with cyanoacetic acid and reaction of the resulting cyanoacetamide with an isothiocyanate in the presence of a base. Alkylation with an appropriate alkyl halide, followed by Thorpe-Ziegier-cyclization yields differently substituted, support-bound 3-aminothiophenes. These may be screened on the substrate or cleaved from the substrate and then screened in solution. Alternatively, the resin-bound 3-amino thiophenes or the synthetic intermediates can be subjected to further synthetic transformations (N-acylation, reduction) on the support, which permits the preparation of further therapeutically interesting compounds. The efficient synthesis of a wide variety of thiophenes using automated synthesis technology of the present method makes these compounds attractive candidates for the generation and rapid screening of diverse thiophene-based libraries. The method disclosed here provides an easy and fast access to highly diverse heterocyclic compounds of therapeutic interest, amenable to automatization.

专利号:US-5847150-A
优先权日:1996-04-24
标题 :Solid phase and combinatorial synthesis of substituted 2-methylene-2, 3-dihydrothiazoles and of arrays of substituted 2-methylene-2, 3-dihydrothiazoles
发明人：DORWALD FLORENCIO ZARAGOZA
权利人:NOVO NORDISK AS
摘要:A solid phase method for the synthesis of a plurality of differently substituted 2-methylenethiazoles with a wide variety of side-chain substituents as compounds of potential therapeutic interest. The 2-methylenethiazoles are prepared by acylation of a substrate-bound primary or secondary amine with cyanoacetic acid and reaction of the resulting cyanoacetamide with an isothiocyanate in the presence of a base. Alkylation with an appropriate alkyl halide under acidic conditions yields differently substituted, support-bound 2-methylene-2,3-dihydrothiazoles. These may be screened on the substrate or cleaved from the substrate and then screened in solution. The efficient synthesis of a wide variety of 2-methylenethiazoles using automated synthesis technology of the present method makes these compounds attractive candidates for the generation and rapid screening of diverse thiazole-based libraries. The method disclosed here provides an easy and fast access to highly diverse heterocyclic compounds of therapeutic interest, amenable to automatization.