New strategies for the development of an asymmetric version of the
Baylis-Hillman reaction.
P. Langer, Angew. Chem., Int. Ed. Engl., 2000, 39, 3049.
Key Words:
ACTIVATED DOUBLE-BONDS/CINCHONA ALKALOIDS/RATE ENHANCEMENT/ALDEHYDES/ESTERS/DERIVATIVES/CATALYSIS/QUINIDINE/SUBSTRATE/MECHANISM
Tetra-n-propyl ammonium perruthenate (TPAP) - an efficient and selective
reagent for oxidation reactions in solution and on the solid phase.
P. Langer, J. Prakt. Chem., 2000, 342, 728.
Key Words:
propyl ammonium perruthenate oxidn solid phase review; TPAP oxidn solid
phase review; propanaminium tripropyl tetraoxoruthenate oxidn review; solid
phase synthesis propyl ammonium perruthenate review; soln phase synthesis propyl
ammonium perruthenate review
Regio- and diastereoselective cyclization reactions of free and masked
1,3-dicarbonyl dianions with 1,2-dielectrophiles.
P. Langer, Chem. Eur. J., 2001, 7, 3858.
Key Words:
anions; cyclization; regioselectivity; silyl enol ethers; tetrahydrofurans;
OXALIC-ACID DIELECTROPHILES; SILYL ENOL ETHERS; STEREOSELECTIVE SYNTHESIS;
REGIOSELECTIVE SYNTHESIS; GAMMA-ALKYLIDENEBUTENOLIDES; STEREOCONTROLLED
SYNTHESIS; TITANIUM TETRACHLORIDE; EFFICIENT SYNTHESIS; AMBIDENT DIANIONS;
CONDENSATION
Cyclization reactions of 1,3-bis-silyl enol ethers and related masked
dianions
P. Langer, Synthesis, 2002, 441.
Key Words:
1,3 dicarbonyl dianions/1,3-bis-silyl enol ethers/SET reactions/Michael
reactions/cyclizations/DIELS-ALDER REACTIONS/TERT-BUTYL ACETOTHIOACETATE/STEREOSELECTIVE
SYNTHESIS/<3+5>-ANNULATION REACTIONS/OXALIC-ACID/DICARBONYL ELECTROPHILES/REGIOSELECTIVE
SYNTHESIS/SILYL ETHERS/GAMMA-ALKYLIDENEBUTENOLIDES/OXIDATIVE CYCLIZATION
Efficient synthesis of nitrogen heterocycles by cyclization of
bis(Nucleophiles) with oxaldiimidoyl dichlorides
P. Langer, M. Doring, Eur. J. Org. Chem., 2002, 221.
Key Words:
anions/cyclizations/domino reactions/nitrogen heterocycles/regioselectivity/OXALIC-ACID
DIELECTROPHILES/STEREOSELECTIVE SYNTHESIS/REGIOSELECTIVE SYNTHESIS/AMBIDENT
DIANIONS/DOMINO-REACTION/BIS(IMIDOYL) CHLORIDES/BIS-IMIDOYLCHLORIDES/SCELETIUM
ALKALOIDS/BUILDING-BLOCKS/SYSTEMS