Abstract:
PROBLEM TO BE SOLVED: To provide an enzymatic or nonenzymatic method for producing 3-methylamino-1-(thien-2-yl)propan-1-ol represented by formula (I), and further, to provide an enzyme for conducting the method, a nucleic acid sequence encoding the enzyme, an expression cassette including the nucleic acid sequence, a vector and a recombinant host organism. SOLUTION: The method comprises the following processes: (a) thiophene is reacted with a halogenated β-halopropionyl or halogenated acryloyl in the presence of a Lewis acid; wherein, either simultaneously or after the reaction but prior to isolating a reaction product, a hydrogen halide is passed through the reaction product to obtain a 3-halo-1-(thien-2-yl)propan-1-one; and (b) the propanone obtained in the step (a) is reduced, and subsequently, the reduced product is reacted with methylamine without isolating the reaction product as appropriate. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
The invention relates to a method for preparing optically active 2-hydroxy acid ester derivatives of the formula R1-C(OH)-C(O)-O-R2 (I),comprising the bringing into contact of 2-oxo acid ester derivatives of the formula R1-C(O)-C(O)-O-R2 (II) with an enzyme (E) selected from the class of dehydrogenases, in the presence of reduction equivalents, where the compound of the formula (II) is enzymatically reduced to the compound of the formula (I), and the reduction equivalents consumed in the course of the reaction are regenerated again by converting a reducing agent (RA) to the corresponding oxidation product (OP) with the help of the enzyme (E). The invention further comprises a dehydrogenase which reduces 2-oxo acid esters in the presence of reduction equivalents to the corresponding S- 2-hydroxy acid esters, and also a nucleic acid encoding the dehydrogenase.
Abstract:
Method for producing (meth)acrylic acid esters (U) containing urethane groups by reacting an alcohol (A) containing urethane groups with a (meth)acrylic acid ester of a saturated alcohol (G) in the presence of at least one polymerization inhibitor (P) having an enzyme (E) as a catalyst in a reactor, wherein a) the released saturated alcohol and the optionally used entrainer form an azeotrope with the excess corresponding (meth)acrylic acid ester (G), the azeotrope is separated by distillation at reduced pressure, and b) at least one partial flow from the sump of the reactor is recirculated via the head of the distillation column.
Abstract:
Process for enzymatic production of compounds of the general formula (2) from unsaturated alkene derivatives of the general formula (1) by reduction of a compound of the formula (1) in the presence of a reductase comprising at least one of the polypeptide sequences SEQ ID NO: 1, 2, or 3 or having a functionally equivalent polypeptide sequence which has at least 80% sequence identity with SEQ ID NO: 1, 2, or 3.
Abstract translation:处理用于通过还原下式的化合物的酶促制备由通式(1)的不饱和链烯烃衍生物,通式(2)的化合物(1)在包含多肽序列SEQ ID NO中的至少一种的还原酶的存在:1,2,或 或3,其具有与SEQ ID NO具有至少80%序列同一性的功能上等同的多肽序列:1,2,或第三
Abstract:
The invention relates to a method for production of amino acids of general formula (3) or (4) from alpha-dehydroamino acids of general formula (1) or (2), where R1 and R2 independently = H, C1-C6 alkyl, C2-C6 alkenyl, optionally substituted carbo- or heterocyclic, aromatic or non-aromatic or alkylaryl, or a carboxyl ( -COOR) group, R3 = H, formyl, acetyl, propionyl, benzyl, benzyloxycarbonyl, BOC, or Alloc and R = H, C1-C6 alkyl or aryl, by reduction of a compound of formula (1) or (2) in the presence of a reductase.
Abstract:
The present invention relates to enzymic processes for preparing S-butan-2-ol; and to enzymes for carrying out said processes; to nucleic acid sequences coding for said enzymes, to expression cassettes, vectors and recombinant hosts containing said nucleic acid sequences.
Abstract:
The invention relates to a lipase variant which can be prepared by carrying out, on the amino acid sequence of a starting lipase selected from the lipase homologous family I.1 or I.2, at least one amino acid substitution in those positions which correspond to the positions 17, 29, 30, 52, 86, 117, 122, 160, 163, 167, 265, 266, 286, 289 in the prototype lipase sequence SEQ ID NO: 1.