添加乙烯基锡烷和烯酮,par l'intermediaire d'une transmetallation avec le(氰基二甲基)cuivre-dilithium。Cette methode est tres generale et a ete appliquee avec succes dans la synthese de prostaglandines
New organoiron synthons. cis- and trans-Vinylene dication equivalents
作者:Marianne Marsi、Myron Rosenblum
DOI:10.1021/ja00335a078
日期:1984.11
Les complexes (dialcoxy-1,2 ethylene)Fp [Fp=η 5 -C 5 H 5 Fe(CO) 2 ] peuvent servir d'equivalents des dications cis ou trans-vinylene
Les complexes (diacoxy-1,2 ethylene)Fp [Fp=η 5 -C 5 H 5 Fe(CO) 2 ] peuvent servir d'equivalents des dications cis ou trans-vinylene
METHOD FOR PREPARING VITTATALACTONE
申请人:BREIT Bernhard
公开号:US20110282075A1
公开(公告)日:2011-11-17
The present invention relates to the chemical synthesis of vittatalactone, the aggregation pheromone of the striped cucumber beetle,
Acalymma vittatum.
Total Synthesis of (+)-Bourgeanic Acid Utilizing <i>o</i>-DPPB-Directed Allylic Substitution
作者:Tomislav Reiss、Bernhard Breit
DOI:10.1021/ol9011635
日期:2009.8.6
The lichen metabolite (+)-bourgeanic acid has been synthesized utilizing a new strategy for the construction of propionate motifs relying on the o-DPPB-directed copper-mediated allylicsubstitution. This synthesis features the o-DPPB-directed allylicsubstitution employing a chiral Grignard reagent, Sharpless asymmetric epoxidation, and reductive epoxide ring opening with a higher order dimethylcuprate
Oxidatively induced insertion and cleavage reactions of alkenyliron complexes. New routes to highly functionalized alkenes
作者:Daniel L. Reger、Edward. Mintz、Lukasz. Lebioda
DOI:10.1021/ja00268a036
日期:1986.4
quantites catalytiques de [Cp 2 Fe]BF 4 ou Ce (IV) en solution a −78°C sous CO, transforment CpFeCO[P(OPh) 3 ](η 1 -C(R 3 )=C (R 1 )R 2 ) en CpFeCO[P(OPh) 3 ](η 1 -C(O)C(R 3 )=CR 1 R 2 ) avec un rendement eleve. La stereochimie des produits depend des groupes R. On peut aussi convertir les complexes alcenylacyl en esters alcenyl, d'ou les alcenes
Des quantites catalytiques de [Cp 2 Fe]BF 4 ou Ce (IV) en solution a -78°C sous CO,转化 CpFeCO[P(OPh) 3 ](η 1 -C(R 3 )=C (R 1 ) R 2 ) en CpFeCO[P(OPh) 3 ](η 1 -C(O)C(R 3 )=CR 1 R 2 ) avec unrendement eleve。Lastereochimie des produits depends des groupes R. On peut aussi convertir les complexes alcenylacyl enesters alcenyl, d'ou les alcenes
Synthesis of the taxol AB-system by olefination of an A-ring C1 ketone and direct B-ring closure
作者:David Crich、Swaminathan Natarajan、Joyce Z Crich
DOI:10.1016/s0040-4020(97)00411-0
日期:1997.5
Two syntheses of 13-deoxy-taxol C1 ketones are presented. Olefination of these C1 ketones is achieved, indirectly, via either the Meyer-Schuster reaction or by introduction of a vinyl group with vinylcerium dichloride followed by allylicrearrangement. Both methods provide the E-olefin exclusively. Dihydroxylation of these olefins is achieved with catalytic OsO4 and NMNO in moderate yield, providing