Stereoselective synthesis of (R)-10-methyltridecan-2-one, the sex pheromone of the southern corn rootworm, using (4S)-benzylthiazolidinethione as a chiral auxiliary
作者:Cui-Fen Lu、Shou-Bo Zhang、Yan Li、Gui-Chun Yang、Zu-Xing Chen
DOI:10.1016/j.tetasy.2009.09.014
日期:2009.10
The stereoselective synthesis of (R)-10-methyltridecan-2-one, the sex pheromone of the southern corn rootworm, was carried out in 20.7% overall yield based on (4S)-benzylthiazolidinethione (five steps). In the crucial step, the stereogenic center was generated by an asymmetric Michael addition using enantiomerically pure (4S)-benzylthiazolidinethione as a chiral auxiliary.
基于(4 S)-苄基噻唑烷硫酮,以50.7%的总收率进行立体选择性合成(R)-10-甲基三苯甲酮-2-酮(南部玉米根虫的性信息素)。在关键步骤中,使用对映体纯的(4 S)-苄基噻唑烷硫酮作为手性助剂,通过不对称迈克尔加成反应生成立体异构中心。
Hydrolytic kinetic resolution of terminal mono- and bis-epoxides in the synthesis of insect pheromones: routes to (−)-( R )- and (+)-( S )-10-methyldodecyl acetate, (−)-( R )-10-methyl-2-tridecanone, (−)-( R )-( Z )-undec-6-en-2-ol (Nostrenol), (−)-(1 R ,7 R )-1,7-dimethylnonyl propanoate, (−)-(6 R ,12 R )-6,12-dimethylpentadecan-2-one, (−)-(2 S ,11 S )-2,11-diacetoxytridecane and (+)-(2 S ,12 S )-2,12-diacetoxytridecane
作者:Sharon Chow、William Kitching
DOI:10.1016/s0957-4166(02)00175-1
日期:2002.5
enantiomerically enriched epoxides and diols, which have been transformed into important insect sex pheromones. In this general approach, (−)-(R)- and (+)-(S)-10-methyldodecyl acetates from the smaller tea tortrix moth were obtained, as was (−)-(R)-10-methyltridecan-2-one from the southern corn rootworm. The (S)-epoxide obtained from undec-1-en-6-yne was transformed to (−)-(R)-(Z)-undec-6-en-2-ol (Nostrenol)
使用(salen)Co(OAc)配合物的官能化环氧化物的水解动力学拆分(HKR)提供了对映体富集的环氧化物和二醇,它们已转化为重要的昆虫性信息素。在这种通用方法中,从较小的茶to蛾中获得了(-)-(R)-和(+)-(S)-10-甲基十二烷基乙酸酯,以及(-)-(R)-10-甲基叔丁基酚2 -来自南部玉米根虫的一种。从十一烯-1-烯-6-炔获得的(S)-环氧化物从蚁狮转变为(-)-(R)-(Z)-十一烯-6-烯-2-醇(Nostrenol)。还研究了合适的双环氧化物的HKR,并提供了生成的双环氧化物和环氧二醇的转化(-)-(1 R,7 - [R )从玉米根-1,7- dimethylnonylpropanoate,( - ) - (6 - [R,12 - [R)-6,12-dimethylpentadecan -2-酮从阴带状黄瓜甲虫,和( - ) - (2-小号来自雌豌豆mid的,11 S
Synthesis of the two enantiomers of the sex pheromone of Diabrotica Undecimpunct at a Howardi and of chiral precursors of other pheromones starting from enantiomerically pure methyl hydrogen (R)-3-methylglutarate
作者:Renzo Rossi、Adriano Carpita、Marco Chini
DOI:10.1016/s0040-4020(01)96510-x
日期:1985.1
methyl hydrogen (R)-3-methylglutarate(2) is a useful chiral building block for the synthesis of several biologically active compounds. Enantiomerically pure (R)-2 has been employed to synthesize stereospecifically each of the two enantiomers, 1a and 1b, of 10-methyl-2-tridecanone, the sex pheromone of the southern corn rootworm, Diabrotica undecimpunctata howardi Barber. Compound (R)-2 has been also
现成的甲基氢(R)-3-甲基戊二酸甲酯(2)是用于合成几种生物活性化合物的有用的手性结构单元。对映体纯的(R)-2已被用于立体定向合成10-甲基-2- tretcanone的两个对映体1a和1b,这是南部玉米根虫性信息素Diabrotica undecimpunctata howardi Barber的性信息素。化合物(R)-2也已用于制备99%光学纯度(R)-3-甲基-1-戊醇(6)和对映体纯度(R)-5-甲基-异三甲苯胺(7)。这些化合物是适用于进一步修饰成其他手性昆虫信息素的有用的结构单元。