摘要:
An α-trifluoromethyl-α,β-unsaturated ester can be produced by reacting an α-trifluoromethyl-α-hydroxy ester with sulfuryl fluoride (SO2F2) in the presence of an organic base. It is preferable that the raw substrate has a hydrogen atom as one β-position substituent group and either an alkyl group, a substituted alkyl group, an alkenyl group, a substituted alkenyl group, an aromatic ring group or a substituted aromatic ring group as the other β-position substituent group. It is more preferable that an ester moiety of the raw substrate is an alkyl ester. This raw substrate is readily available. Further, the desired reaction can proceed favorably with the use of this raw substrate. It is also preferable to use either 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) or 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) as the organic base. The desired reaction can proceed more favorably with the use of this organic base.
摘要:
An α-trifluoromethyl-α,β-unsaturated ester can be produced by reacting an α-trifluoromethyl-α-hydroxy ester with sulfuryl fluoride (SO2F2) in the presence of an organic base. It is preferable that the raw substrate has a hydrogen atom as one β-position substituent group and either an alkyl group, a substituted alkyl group, an alkenyl group, a substituted alkenyl group, an aromatic ring group or a substituted aromatic ring group as the other β-position substituent group. It is more preferable that an ester moiety of the raw substrate is an alkyl ester. This raw substrate is readily available. Further, the desired reaction can proceed favorably with the use of this raw substrate. It is also preferable to use either 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) or 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) as the organic base. The desired reaction can proceed more favorably with the use of this organic base.
摘要:
α-Trifluoromethyl-β-substituted-β-amino acids can be produced by allowing α-trifluoromethyl-β-substituted-α,β-unsaturated esters to react with hydroxylamine to convert α-trifluoromethyl-β-substituted-α,β-unsaturated esters into dehydrogenated closed-ring body of α-trifluoromethyl-β-substituted-β-amino acid, and by hydrogenolyzing the dehydrogenated closed-ring body. According to this production process, novel α-trifluoromethyl-β-substituted-β-amino acids which are free amino acids whose functional groups are not protected can be produced, in which β-position substituent is not limited to aromatic ring group or substituted aromatic ring group while the relative stereochemistry of α-position and β-position can be also controlled.
摘要:
α-Trifluoromethyl-β-substituted-β-amino acids can be produced by allowing α-trifluoromethyl-β-substituted-α,β-unsaturated esters to react with hydroxylamine to convert α-trifluoromethyl-β-substituted-α,β-unsaturated esters into dehydrogenated closed-ring body of α-trifluoromethyl-β-substituted-β-amino acid, and by hydrogenolyzing the dehydrogenated closed-ring body. According to this production process, novel α-trifluoromethyl-β-substituted-β-amino acids which are free amino acids whose functional groups are not protected can be produced, in which β-position substituent is not limited to aromatic ring group or substituted aromatic ring group while the relative stereochemistry of α-position and β-position can be also controlled.
摘要:
By reacting a β-hydroxy-α-amino acid with sulfuryl fluoride (SO2F2) in the presence of an organic base, it is possible to produce an α-fluoro-β-amino acid of the formula [2]. By using a C8-12 tertiary amine having two or more alkyl groups of C3 or higher, and especially diisopropylethylamine, as the organic base, by-production of quantery ammonium salts is effectively suppressed. By applying the production process of the present invention, it is possible to very easily produce (2R)-3-(dibenzylamino)-2-fluoropropionic acid methyl ester, which is extremely important as a pharmaceutical intermediate, with high positional selectivity even on an industrial scale.
摘要:
By reacting a β-hydroxy-α-amino acid with sulfuryl fluoride (SO2F2) in the presence of an organic base, it is possible to produce an α-fluoro-β-amino acid of the formula [2]. By using a C8-12 tertiary amine having two or more alkyl groups of C3 or higher, and especially diisopropylethylamine, as the organic base, by-production of quantery ammonium salts is effectively suppressed. By applying the production process of the present invention, it is possible to very easily produce (2R)-3-(dibenzylamino)-2-fluoropropionic acid methyl ester, which is extremely important as a pharmaceutical intermediate, with high positional selectivity even on an industrial scale.
摘要:
There is provided a novel, useful dehydroxyfluorination agent containing sulfuryl fluoride (SO2F2) and an organic base that is free from a free hydroxyl group in the molecule. According to the present dehydroxyfluorination agent, it is not necessary to use perfluoroalkanesulfonyl fluoride, which is not preferable in large-scale use, and it is possible to advantageously produce optically-active fluoro derivatives, which are important intermediates of medicines, agricultural chemicals and optical materials, for example, 4-fluoroproline derivatives, 2′-deoxy-2′-fluorouridine derivatives, optically-active α-fluorocarboxylate derivatives, and monofluoromethyl derivatives, even in large scale.
摘要翻译:提供了含有硫酰氟(SO 2 F 2)和分子中不含游离羟基的有机碱的新型有用的脱羟基氟化剂。 根据现有的脱羟基氟化剂,不需要使用全氟烷基磺酰氟,其在大规模使用中是不优选的,并且可以有利地制备作为药物,农药和光学的重要中间体的光学活性氟衍生物 材料,例如4-氟脯氨酸衍生物,2'-脱氧-2'-氟尿苷衍生物,光学活性α-氟代羧酸酯衍生物和单氟甲基衍生物,甚至大规模。
摘要:
There is provided a novel, useful dehydroxyfluorination agent containing sulfuryl fluoride (SO2F2) and an organic base that is free from a free hydroxyl group in the molecule. According to the present dehydroxyfluorination agent, it is not necessary to use perfluoroalkanesulfonyl fluoride, which is not preferable in large-scale use, and it is possible to advantageously produce optically-active fluoro derivatives, which are important intermediates of medicines, agricultural chemicals and optical materials, for example, 4-fluoroproline derivatives, 2′-deoxy-2′-fluorouridine derivatives, optically-active α-fluorocarboxylate derivatives, and monofluoromethyl derivatives, even in large scale.
摘要翻译:提供了含有硫酰氟(SO 2 F 2)和分子中不含游离羟基的有机碱的新型有用的脱羟基氟化剂。 根据现有的脱羟基氟化剂,不需要使用全氟烷基磺酰氟,其在大规模使用中是不优选的,并且可以有利地制备作为药物,农药和光学的重要中间体的光学活性氟衍生物 材料,例如4-氟脯氨酸衍生物,2'-脱氧-2'-氟尿苷衍生物,光学活性α-氟代羧酸酯衍生物和单氟甲基衍生物,甚至大规模。
摘要:
It was found that a fluoro derivative can be produced by reacting a hydroxy derivative with sulfuryl fluoride (SO2F2) in the presence of an organic base or in the presence of an organic base and “a salt or complex comprising an organic base and hydrogen fluoride”. According to the present production process, it is not necessary to use perfluoroalkanesulfonyl fluoride, which is not preferable in industrial use, and it is possible to advantageously produce optically-active fluoro derivatives, which are important intermediates of medicines, agricultural chemicals and optical materials, specifically 4-fluoroproline derivatives, 2′-deoxy-2′-fluorouridine derivatives, optically-active α-fluorocarboxylate derivatives, and the like, even in a large scale.
摘要翻译:发现氟衍生物可以通过羟基衍生物与硫酰氟(SO 2 F 2)在有机碱的存在下或在有机碱和“含有机碱和氟化氢的盐或络合物”的存在下反应来制备, 。 根据本制造方法,不需要使用在工业上不优选的全氟烷基磺酰氟,可以有利地制造作为药物,农药,光学材料的重要中间体的光学活性氟衍生物, 特别是4-氟脯氨酸衍生物,2'-脱氧-2'-氟尿苷衍生物,光学活性α-氟代羧酸酯衍生物等,甚至大规模。
摘要:
It was found that a fluoro derivative can be produced by reacting a hydroxy derivative with sulfuryl fluoride (SO2F2) in the presence of an organic base or in the presence of an organic base and “a salt or complex comprising an organic base and hydrogen fluoride”. According to the present production process, it is not necessary to use perfluoroalkanesulfonyl fluoride, which is not preferable in industrial use, and it is possible to advantageously produce optically-active fluoro derivatives, which are important intermediates of medicines, agricultural chemicals and optical materials, specifically 4-fluoroproline derivatives, 2′-deoxy-2′-fluorouridine derivatives, optically-active α-fluorocarboxylate derivatives, and the like, even in a large scale.
摘要翻译:发现氟衍生物可以通过羟基衍生物与硫酰氟(SO 2 H 2 F 2)在有机碱的存在下或在有机碱存在下反应来制备 有机碱和“含有机碱和氟化氢的盐或络合物”。 根据本制造方法,不需要使用在工业上不优选的全氟烷基磺酰氟,可以有利地制造作为药物,农药,光学材料的重要中间体的光学活性氟衍生物, 特别是4-氟脯氨酸衍生物,2'-脱氧-2'-氟尿苷衍生物,光学活性α-氟代羧酸酯衍生物等,甚至大规模。