Synthetic studies of didemnins. IV. Synthesis of the macrocycle
作者:William R. Ewing、Bruce D. Harris、Wen-Ren Li、Madeleine M. Joullie
DOI:10.1016/s0040-4039(01)80647-x
日期:1989.1
A stereocontrolled route to the 23-membered macrocycle found in the didemnins is described.
描述了在双氢精蛋白中发现的到23元大环的立体控制途径。
Total synthesis and structural investigations of didemnins A, B, and C
作者:Wen Ren Li、William R. Ewing、Bruce D. Harris、Madeleine M. Joullie
DOI:10.1021/ja00177a030
日期:1990.10
Didemnins A, B, and C were efficiently prepared in a stereocontrolled manner, producing the common macrocycle and, in a separate step, introducing the substituents on the amino group of L-threonine as optically pure units. We envisaged that disconnections between L-leucine and the HIP group (2S,4S) and between L-threonine and isostatine (3S,4R,5S) would afford two units: a HIP-isostatine unit (I) and
Didemnins A、B 和 C 以立体控制的方式有效制备,产生常见的大环,并在单独的步骤中,在 L-苏氨酸的氨基上引入取代基作为光学纯单元。我们设想 L-亮氨酸和 HIP 基团 (2S,4S) 之间以及 L-苏氨酸和异司他汀 (3S,4R,5S) 之间的断开将提供两个单元:HIP-异司他汀单元 (I) 和四肽单元 (II) )
타칼시톨의 제조방법 및 그를 위한 중간체
申请人:YONSUNG FINE CHEMICAL CO. LTD. 연성정밀화학(주)(120010064469) Corp. No ▼ 130111-0057158BRN ▼135-81-35444
公开号:KR20180116959A
公开(公告)日:2018-10-26
본 발명은 타칼시톨의 제조방법 및 그에 사용되는 중간체에 관한 것이다. 본 발명의 제조방법에 따르면, 타칼시톨을 복잡하고 긴 제조 과정을 거치지 않고, 효율적이고 경제적으로 제조할 수 있다.
Access to Functionalized Steroid Side Chains via Modified Julia Olefination
作者:Enver Cagri Izgu、Aaron C. Burns、Thomas R. Hoye
DOI:10.1021/ol102936z
日期:2011.2.18
Various functionalizedsteroidalsidechains were conveniently accessed by a modified Julia olefination strategy using a common sulfone donor and an appropriate α-branched aldehyde acceptor. For the coupling of these hindered classes of reaction partners (and in contrast to typically observed trends), the benzothiazolyl(BT)-sulfone anion gave superior outcomes compared to the phenyltetrazolyl(PT)-sulfone
使用常见的砜供体和合适的α-支化醛受体,通过改进的 Julia 烯化策略可以方便地获得各种功能化的甾体侧链。对于这些受阻类别的反应伙伴的偶联(并且与通常观察到的趋势相反),与苯基四唑基 (PT)-砜阴离子相比,苯并噻唑基 (BT)-砜阴离子具有更好的结果。
AN ASYMMETRIC SYNTHESIS OF α-BENZYLOXY ALDEHYDES HAVING A CHIRAL TERTIARY CENTER—AN APPLICATION TO THE ASYMMETRIC SYNTHESIS OF<i>exo</i>-(+)-BREVICOMIN—
作者:Masatoshi Asami、Teruaki Mukaiyama
DOI:10.1246/cl.1983.93
日期:1983.1.5
α-Benzyloxy aldehydes having a chiral tertiary center at α-carbon atom are synthesized in high enantiomeric excess by successive treatment of 2-methoxycarbonyl-3-phenyl-1,3-diazabicyclo[3.3.0]octane with diisobutylaluminum hydride (DIBAL-H) and Grignard reagents. The asymmetric reaction is applied to the total synthesis of exo-(+)-brevicomin.