Biotransformation of a series of racemic N-benzoyl alpha-amino acids by the fungus Beauveria bassiana ATCC 7159 results in isolation of the corresponding D-amino acid benzamides in high enantiomeric purity and yield.
The invention relates to agents preventing (the formation of) human malodour. In particular, the invention relates to the use of several classes of compounds which can act as such agents in cosmetic products, such as deodorants and antiperspirants. These compounds are normally odourless or nearly so, but upon contacting the skin as for example, in skin care compositions or in personal care compositions, they prevent malodour.
The compounds under consideration are compounds of the formula
X-(Z)n-CO-NH-CH-(COO-Y)-CH2CH2CONH2 I
The definition of the substituents is given in the specification.
本发明涉及防止(形成)人体恶臭的制剂。特别是,本发明涉及几类化合物在除臭剂和止汗剂等化妆品中作为此类制剂的用途。这些化合物通常是无味或几乎无味的,但在接触皮肤时,例如在皮肤护理组合物或个人护理组合物中,它们可以防止恶臭。
本文所讨论的化合物为以下式子的化合物
X-(Z)n-CO-NH-CH-(COO-Y)-CH2CH2CONH2 I
取代基的定义见说明书。
METHOD OF RESOLVING OPTICAL ISOMERS OF AMINO ACID DERIVATIVE
申请人:TOKUYAMA CORPORATION
公开号:EP1338588A1
公开(公告)日:2003-08-27
Provided is a separating method for an optical isomer mixture comprising the steps of mixing an amino acid derivative such as N-(tert-butoxycarbonyl)-DL-alanine in which optical isomers of a D type and an L type are present in a mixture with a hydrophilic compound such as β-cyclodextrin having a different affinity to two kinds of the optical isomers described above and then bringing the resulting aqueous solution or aqueous suspension into contact with a hydrophobic substance such as a solid matter subjected on a surface thereof to hydrophobic treatment on the condition that the pH is 3.5 or lower or under the coexistence of ions including an atomic group having hydrophobicity which can be a counter ion for the amino acid derivative described above such as a triethylammonium ion to thereby separate the D type amino acid derivative from the L type amino acid derivative present in the above aqueous solution or aqueous suspension.
本发明提供了一种光学异构体混合物的分离方法,该方法包括以下步骤:将氨基酸衍生物(如 N-(叔丁氧羰基)-DL-丙氨酸)与亲水性化合物(如对上述两种光学异构体具有不同亲和力的 β-环糊精)混合,在混合物中存在 D 型和 L 型光学异构体。对上述两种光学异构体具有不同亲和力的环糊精的混合物,然后将所得水溶液或水悬浮液与疏水性物质接触,如在其表面进行疏水处理的固体物质,条件是 pH 值为 3.5或更低的pH值,或在包括具有疏水性的原子团的离子共存的条件下,该原子团可以是上述氨基酸衍生物的反离子,例如三乙基铵离子,从而将上述水溶液或水悬浮液中的D型氨基酸衍生物与L型氨基酸衍生物分离。
Bruckner et al., Acta Chimica Academiae Scientiarum Hungaricae, 1959, vol. 21, p. 105,116
作者:Bruckner et al.
DOI:——
日期:——
EP1052968A4
申请人:——
公开号:EP1052968A4
公开(公告)日:2004-09-15
$g(a)-AMIDES OF $i(L)-AMINO ACIDS AS FRAGRANCE PRECURSORS