Terpenes in organic synthesis 13. Synthesis of s-(+)-methoprene from (+)-?-citronellene
作者:�. P. Serebryakov、G. M. Zhdankina、G. V. Kryshtal'、M. V. Mavrov、Nguen Kong Khao
DOI:10.1007/bf00958564
日期:1991.4
S-(+)-Methoprene (I) was synthesized from (+)-beta-citronellene (III) with an optical purity of about 50%. The optical purity of the key intermediate, S-(-)-7-methoxy-3,7-dimethyl-1-octanol (IV), can be increased by fractional crystallization of the optically active acid phthalate salt (VI) followed by hydrolytic regeneration of alcohol (IV). The yield of (I) at the final synthetic stage can be increased by use of interphase catalysis. S-(+)-Methoprene has a higher morphogenetic activity than the racemic form.
ADDITIVE MIXTURE
申请人:BASF SE
公开号:EP3684858A1
公开(公告)日:2020-07-29
Solid Fragrance-Containing Composition
申请人:Henkel AG & Co. KGaA
公开号:US20200248110A1
公开(公告)日:2020-08-06
A solid, particulate composition having at least one water-soluble carrier material and at least one fragrance, wherein the carrier material is a water-containing salt (hydrate) whose water vapour partial pressure at a specific temperature in the range from 30 to 100° C. corresponds to the H
2
O partial pressure of the saturated solution of this salt, such that the salt melts at this temperature in its own crystal water. The composition is characterized in that it has a distinctly improved water solubility compared to known polyethylene glycol-based compositions. The invention further relates to methods for producing the solid composition, and to a washing or cleaning product including the solid composition. In addition, the invention relates to the use of a washing or cleaning product for cleaning textiles or hard surfaces, and corresponding methods for cleaning textiles or hard surfaces using a washing or cleaning product of this kind.
[EN] ADDITIVE MIXTURE<br/>[FR] MÉLANGE D'ADDITIFS
申请人:BASF SE
公开号:WO2019053187A1
公开(公告)日:2019-03-21
An additive mixture comprising (I) a copolymer having a number average molecular weight of 800 g/mol to 50 000 g/mol and containing recurring units of the formula (la) and (Ila) or recurring units of the formula (la) and (IIb), wherein the recurring units (la) and (Ila) can have a random, alternating or block distribution and the molar ratio of (la) to (Ila) is 1 : 10 to 10: 1, the recurring units (la) and (lIb) can have a random, alternating or block distribution and the molar ratio of (la) to (lIb) is 1 : 10 to 10: 1, the radicals R1 independently of one another are C10-C30alkyl and the radicals R2 independently of one another are hydrogen or C1-C30acyl, (II) a metal salt, preferably a transition metal salt, and (III) an oxidizable substrate, with the proviso that components (I) and (III) are different.