A NOVEL APPROACH TO COMPLEX TERPENOID METHYLENECYCLOHEXANESHENNING R; HOFFMANN HMR.1982; TETRAHEDRON LETT.; ISSN 0040-4039; GBR; DA. 1982; VOL. 23; NO 22; PP. 2305-2308; BIBL. 12 REF.Article

SYNTHESIS OF 2-NORZIZAENE AND 9,10-DEHYDRO-2-NORZIZAENE (7,7-DIMETHYL-6-METHYLIDENETRICYCLO (6.2.1.0^1,5) UNDEC-9-ENE) VIA INTRAMOLECULAR ALLYL CATION INDUCED CYCLOADDITIONHOFFMANN HMR; HENNING R.1983; HELVETICA CHIMICA ACTA; ISSN 0018-019X; CHE; DA. 1983; VOL. 66; NO 3; PP. 828-841; BIBL. 16 REF.Article

A NEW APPROACH TO DEHYDROCAMPHENILONE AND CAMPHENILONEISMAIL ZM; HOFFMANN HMR.1982; CHEM. BER.; ISSN 0009-2940; DEU; DA. 1982; VOL. 115; NO 3; PP. 1256-1258; ABS. GER; BIBL. 6 REF.Article

OCTAMETHYL-1,4-CYCLOHEXANEDIONE. CHAIR CONFORMATION IN THE CRYSTAL STATE.HOFFMANN HMR; HURSTHOUSE MB.1976; J. AMER. CHEM. SOC.; U.S.A.; DA. 1976; VOL. 98; NO 23; PP. 7449-7450; BIBL. 9 REF.Article

ALPHA ,ALPHA '-DIBROMOCYCLOALKANONES. PREPARATION AND CONFORMATIONHOFFMANN HMR; VINTER JG.1974; J. ORG. CHEM.; U.S.A.; DA. 1974; VOL. 39; NO 26; PP. 3921-3924; BIBL. 16 REF.Article

SYNTHESE VON ACYLCYANIDEN AUS ACYLIODIDEN = SYNTHESE DE CETONITRILES A PARTIR D'IODURES D'ACYLEHAASE K; HOFFMANN HMR.1982; ANGEW. CHEM.; ISSN 0044-8249; DEU; DA. 1982; VOL. 94; NO 1; PP. 80; BIBL. 5 REF.Article

OXYGENATED LIMONENE ANALOGS. PREPARATION OF TETRAMETHYLATED CARVONE AND CARVEOLS VIA REGIOCONTROLLED OPENING OF TETRAMETHYLLIMONENE OXIDEGIGUERE RJ; HOFFMANN HMR.1981; TETRAHEDRON LETT.; ISSN 0040-4039; GBR; DA. 1981; VOL. 22; NO 50; PP. 5039-5042; BIBL. 12 REF.Article

THE SYNTHESIS OF ACYL IODIDESHOFFMANN HMR; HAASE K.1981; SYNTHESIS (STUTTG.); ISSN 0039-7881; DEU; DA. 1981; NO 9; PP. 715-719; BIBL. 17 REF.Article

CYCLOBUTENECARBOXYLIC ESTERS VIA ALUMINUM CHLORIDE INDUCED (2+2) CYCLOADDITIONS OF 2-PROPYNOIC ESTERS TO CYCLIC OLEFINSFIENEMANN H; HOFFMANN HMR.1979; J. ORG. CHEM.; USA; DA. 1979; VOL. 44; NO 5; PP. 2802-2804; BIBL. 12 REF.Article

ACYLATION OF OLEFINS BY ACETYL HEXACHLOROANTIMONATE. SELECTIVE FORMATION OF BETA ,GAMMA -UNSATURATED KETONES UNDER KINETIC CONTROL AND MECHANISTIC RATIONALE AS AN ENE REACTION.HOFFMANN HMR; TSUSHIMA T.1977; J. AMER. CHEM. SOC.; U.S.A.; DA. 1977; VOL. 99; NO 18; PP. 6008-6011; BIBL. 22 REF.Article

THE BEHAVIOUR OF SOME ALPHA ,ALPHA '-DIBROMOKETONES ON ELECTRON IMPACT. AN ANALOGY TO THE REDUCTIVE REMOVAL OF BROMINE IN SOLUTION.HOFFMANN HMR; LONDON AG.1976; ORG. MASS. SPECTROM.; G.B.; DA. 1976; VOL. 11; NO 10; PP. 1077-1080; BIBL. 5 REF.Article

CYCLOADDITIONS OF CYCLIC ALLYL CATIONS TO FURAN. CONFIGURATION AND CONFORMATIONAL ANALYSIS OF THE RESULTING BRIDGED SIX-MEMBERED RINGS. ISOLATION AND IDENTIFICATION OF BOAT AND CHAIR ATROPISOMERS.VINTER JG; HOFFMANN HMR.1974; J. AMER. CHEM. SOC.; U.S.A.; DA. 1974; VOL. 96; NO 17; PP. 5466-5478; BIBL. 21 REF.Article

EIN EINFACHES, DIALKYLIERTES ENOL = UN ENOL SIMPLE, DIALCOYLEHOFFMANN HMR; SCHMIDT EA.1973; ANGEW. CHEM.; DTSCH.; DA. 1973; VOL. 85; NO 5; PP. 227; BIBL. 7 REF.Serial Issue

NEUE DIHYDROPYRANE: LEWIS-SAEURE-KATALYSIERTE CYCLOADDITIONEN ALPHA ,BETA -UNGESAETTIGTER ACYLCYANIDE MIT EINFACHEN, NICHT-AKTIVIERTEN OLEFINEN UND DIENEN; EIN LEICHTER ZUGANG ZU DERIVATEN DES ROSENOXIDS = NOUVEAUX DIHYDRO PYRANNES: CYCLOADDITIONS CATALYSEES PAR DES ACIDES DE LEWIS ENTRE CYANURES D'ACYLE ALPHA ,BETA -INSATURES ET DES OLEFINES SIMPLES NON ACTIVEES OU DES DIENES; UN ACCES FACILE AUX DERIVES DU ROSE OXYDEISMAIL ZM; HOFFMANN HMR.1982; ANGEW. CHEM.; ISSN 0044-8249; DEU; DA. 1982; VOL. 94; NO 11; PP. 862-863; BIBL. 4 REF.Article

2-IODOETHYL ESTERS FROM ACYL CHLORIDES, ETHYLENE OXIDE, AND SODIUM IODIDEBELSNER K; HOFFMANN HMR.1982; SYNTHESIS (STUTTG.); ISSN 0039-7881; DEU; DA. 1982; NO 3; PP. 239-240; BIBL. 5 REF.Article

CYCLOADDITIONS OF ALLYL CATIONS. XXI: SYNTHESIS AND ¹H NMR SPECTRA OF BICYCLO (3.2.1) OCTA-2,6-DIENES AND 3-METHYLENEBICYCLO (3.2.1) OCT-6-ENES FROM BICYCLO (3.2.1) OCT-6-EN-3-ONES METHYLATED AT C-2 AND C-4HOFFMANN HMR; VATHKE H.1980; CHEM. BER.; ISSN 0009-2940; DEU; DA. 1980; VOL. 113; NO 11; PP. 3416-3440; ABS. GER; BIBL. 12 REF.Article

CYCLOADDITIONS OF ALLYL CATIONS. XXII: ALLYL ALCOHOLS AS PRECURSORS OF ALLYL CATIONSHOFFMANN HMR; MATTHEI J.1980; CHEM. BER.; ISSN 0009-2940; DEU; DA. 1980; VOL. 113; NO 12; PP. 3837-3847; ABS. GER; BIBL. 15 REF.Article

ONE-POT SYNTHESIS OF NOVEL MONOTERPENOID ETHERS.CHIDGEY R; HOFFMANN HMR.1978; TETRAHEDRON LETTERS; G.B.; DA. 1978; NO 11; PP. 1001-1004; BIBL. 8 REF.Article

IMPROVED PROCEDURE FOR THE GENERATION OF ALLYL CATIONS FROM SIMPLE DIBROMO KETONES. CHANGE OF MECHANISM ON REACTION WITH TRIETHYL BORATE AND ZINC. CYCLOADDITIONS TO CONJUGATED DIENESHOFFMANN HMR; IQBAL MN.1975; TETRAHEDRON LETTERS; G.B.; DA. 1975; NO 50; PP. 4487-4490; BIBL. 8 REF.Article

CYCLOADDITIONS OF ALLYL CATIONS. XXIX: ACID CATALYZED REACTIONS OF 2,3-DIMETHYL-3-PENTEN-2-OL AND CYCLOPENTADIENE IN TWO PHASES: FORMATION OF SEVEN- AND FIVE-MEMBERED RINGSHOFFMANN HMR; VATHKE ERNST H.1981; CHEM. BER.; ISSN 0009-2940; DEU; DA. 1981; VOL. 114; NO 8; PP. 2898-2906; ABS. GER; BIBL. 11 REF.Article

CYCLOADDITIONS OF ALLYL CATIONS. XXV: ACID CATALYZED DEHYDRATIVE CYCLODIMERIZATION OF 2,4-DIMETHYL-3-PENTEN-2-OL IN TWO PHASES. BIOMIMETIC ONE-POT PREPARATION OF 3,3,5,5-TETRAMETHYLLIMONENE (4-ISOPROPENYL-1,3,3,5,5-PENTAMETHYL-1-CYCLOHEXENE)HOFFMANN HMR; VATHKE ERNST H.1981; CHEM. BER.; ISSN 0009-2940; DEU; DA. 1981; VOL. 114; NO 3; PP. 1182-1186; ABS. GER; BIBL. 4 REF.Article

CYCLOADDITIONS OF ALLYL CATIONS. XXVIII: NOVEL DIELS-ALDER ADDITIONS VIA ACID CATALYZED REACTIONS OF 4-METHYL-3-PENTEN-2-OL WITH CYCLOPENTADIENE AND CYCLOHEXADIENE IN TWO PHASES. FORMATION OF MONOCYCLIC, BICYCLIC, AND TRICYCLIC ADDUCTS AND DOUBLE FRAGMENTATION OF A NORBORNENYLCARBINOLHOFFMANN HMR; VATHKE ERNST H.1981; CHEM. BER.; ISSN 0009-2940; DEU; DA. 1981; VOL. 114; NO 6; PP. 2208-2216; ABS. GER; BIBL. 6 REF.Article

DEHYDRATIVE CYCLODIMERIZATION OF 4-METHYL-3-PENTEN-2-OL IN TWO PHASES. ONE-POT PREPARATION OF DIMETHYLATED LIMONENES AND ALPHA -TERPINEOLVATHKE ERNST H; HOFFMANN HMR.1981; CHEM. BER.; ISSN 0009-2940; DEU; DA. 1981; VOL. 14; NO 4; PP. 1548-1550; ABS. GER; BIBL. 3 REF.Article

LOSS OF ALLYL CATION CONFIGURATION IN CYCLOADDITIONS TO ELECTRON-RICH CONJUGATED DIENESRAWSON DI; CARPENTER BK; HOFFMANN HMR et al.1979; J. AMER. CHEM. SOC.; USA; DA. 1979; VOL. 101; NO 7; PP. 1786-1793; BIBL. 41 REF.Article

9,10-DIHYDRO-9,10-PROPANOANTHRACENESGIGUERE J; RAWSON DI; HOFFMANN HMR et al.1978; SYNTHESIS; DEU; DA. 1978; NO 12; PP. 902-905; BIBL. 10 REF.Article