Catalytic Asymmetric Synthesis of Chiral Allylic Esters
作者:Jeffrey S. Cannon、Stefan F. Kirsch、Larry E. Overman
DOI:10.1021/ja106685w
日期:2010.11.3
A broadly useful catalytic enantioselective synthesis of branched allylicesters from prochiral (Z)-2-alkene-1-ols has been developed. The starting allylicalcohol is converted to its trichloroacetimidate intermediate by reaction with trichloroacetonitrile, either in situ or in a separate step, and this intermediate undergoes clean enantioselective S(N)2' substitution with a variety of carboxylic acids
Method for producing allyl compound, and ether or ester compound produced thereby
申请人:MITSUBISHI CHEMICAL CORPORATION
公开号:US20040147757A1
公开(公告)日:2004-07-29
A method for producing an allyl compound having a compositional formula different from that of an allyl starting material compound, which comprises reacting the allyl starting material compound with an oxygen nucleophilic agent in the presence of a catalyst containing at least one transition metal compound containing a transition metal selected from the group consisting of transition metals belonging to Group 8 to Group 10 of the Periodic Table and a multidentate phosphite compound.
Polymers of 3-butene esters, their preparation and use
申请人:Eastman Chemical Company
公开号:US20010051690A1
公开(公告)日:2001-12-13
The specification describes various polymers having monomer of formula (I):
1
In formula (I), R1 and R2 are, independently, hydrogen, a C
1
-C
24
alkyl group, an aromatic or heteroaromatic group, a C
3
-C
8
cycloalkyl or C
2
-C
7
heterocycloalkyl group, or a —C(O)R3 group in which R3 is a C
1
-C
24
alkyl group, an aromatic or heteroaromatic group, a C
3
-C
8
cycloalkyl or C
2
-C
7
heterocyclic group; or a —CH
2
—C(O)—R4 group in which R4 is a C
1
-C
6
alkyl group. At least one of R1 and R2 is a —C(O)R3 group. The polymer may be a homopolymer or a copolymer containing other ethylenically unsaturated monomers. The polymer may be used in a variety of coating compositions such as inks, adhesives, paints and films. Unique monomers where both R1 and R2 are acetoacetyl groups and novel monomers where R2 is an acetoacetyl group are also described.
An efficient one-potmethod for the regioselective bromination of allylicalcoholderivatives (two-step reaction sequence) followed by Sonogashira, Negishi, or Suzuki–Miyaura coupling reactions in the same reaction vessel (three-step reaction sequence) has been developed. The key reaction in these one-pot systems is the regioselective DBU-promoted trans HBr elimination of vicinal dibromides bearing
Asymmetric induction in nitrile oxide cycloadditions to 3-butene-1,2-diol and derivatives
作者:Volker Jäger、Rudolf Schohe、Erich F Paulus
DOI:10.1016/s0040-4039(00)94123-6
日期:1983.1
Nitrile oxide cycloadditions to 3-butene-1,2-diol and derivatives thereof show varying degrees of erythro selectivity, ranging from 0 to ca. 0.9 kcal/mol. Some of these results are rationalized qualitatively on the basis of the Felkin-Anh-Houk model.