An efficient dehydrogenativeDiels–Alder (DHDA) reaction of prenylderivatives with 2,3‐dichloro‐5,6‐dicyanobenzoquinone (DDQ) has been developed under mild conditions, leading to a series of cyclohexene derivatives with good to excellent yields and excellent diastereoselectivity.
synthesized using (R)-2,2[prime or minute]-dihydroxy-1,1[prime or minute]-binaphthyl-4,4[prime or minute]-dibenzoic acid as chiral ligand, which acts as an effective heterogeneous catalyst for asymmetric Diels-Alderreaction between isoprene and...
Asymmetric Diels–Alder and ene reactions promoted by a Ti(IV) complex bearing a C2-symmetric tridentate ligand
作者:G. Manickam、G. Sundararajan
DOI:10.1016/s0957-4166(99)00300-6
日期:1999.7
A new Ti(IV) complex obtained from the C2-symmetric amino diol (1R,5R)-3-aza-3-benzyl-1,5-diphenyl pentan-1,5-diol, (1R,5R)-1, is used effectively as a Lewis acid promoter in asymmetric Diels–Alder reactions. Using various Evans' oxazolidinones as dienophiles and cyclopentadiene as the diene high yields of the adducts with moderate enantioselectivity, under different reaction conditions are achieved
Compounds And Compositions Containing Silicon And/Or Other Heteroatoms And/Or Metals And Methods of Making And Using Them
申请人:Welker Mark E.
公开号:US20100056801A1
公开(公告)日:2010-03-04
The present invention relates to compounds, intermediates, compositions, and methods of making compounds and intermediates related to the compounds of Formula (I) and/or Formula (II) and/or Formula (III) and/or Formula (IV) and/or Formula (VI) and/or Formula (VII) as disclosed herein wherein the various substituents are as defined in the written description.