摘要:

AbstractOf the six possible isoquinolines with both a bromo and an ethoxy substituent in the pyridine nucleus, all, except 4‐bromo‐3‐ethoxyisoquinoline, react by simple nucleophilic substitution of the bromo atom and, if placed in position 1, of the ethoxy group. 4‐Bromo‐3‐ethoxyisoquinoline yields a complicated reaction mixture, containing in addition to substitution products dehalogenated compounds and at least five different substituted biis

ISSN:0165-0513    

DOI:10.1002/recl.19760950202

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractReaction of 4‐chloro‐3,6‐diphenylpyridazine with potassium amide in liquid ammonia gives 4‐amino‐3,6‐diphenylpyridazine and imino‐4,4′‐bis(3,6‐diphenylpyridazine). Starting with 4‐chloro‐3,6‐diphenylpyridazine‐[5‐13C], it was proved by quantitative13CNMR measurements that both products are formed via the intermediacy of 4,5

ISSN:0165-0513    

DOI:10.1002/recl.19760950203

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractTreatment of thiocamphorS‐oxide2with thallium(I) ethoxide gives a thallium(I) vinyl‐sulfenate which alkylates at sulfur with the alkyl halides CH3I, C6H5CH2Br, CH2CHCH2Br, EtOOCCH2Br, NCCH2Cl, CH3COCH2Cl andp‐BrC6H4COCH2Br to the α,β‐unsaturated sulfoxides3. These products were converted into the corresponding sulfones which were prepared by an alternative route from thiocamphor by treatment with LiN(iPr)2,S‐alkylation to vinyl sulfides5and subsequ

ISSN:0165-0513    

DOI:10.1002/recl.19760950204

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractDimethyl tetramethylbicyclo[2.2.0]hexa‐2,5‐diene‐2,3‐dicarboxylate (1) and some related compounds were hydrogenated in the presence of a number of Group VIII metal catalysts. Heterogeneous hydrogenation under ambient conditions resulted inexo,exoaddition of one mole of hydrogen. The regioselectivity was strongly dependent on the catalyst, and on the nature and steric requirements of the substituents. Hydrogenation of1in the presence of a homogeneous platinum‐tin catalyst resulted in exclusive hydrogenation of the ester‐substituted double bond;exo,endohydrogenation was invol

ISSN:0165-0513    

DOI:10.1002/recl.19760950205

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractThe hydroxyl group ofN‐formyl‐2‐hydroxy‐3‐methoxy‐6‐oxomorphinan (7) can be readily etherified with 5‐chloro‐1‐phenyltetrazole. The etherification of isomers with the hydroxyl group in position 4 scarcely takes place, if at all. Catalytic hydrogenolysis of the ether of 7 gives dehydroxylation of7toN‐formyl‐S‐m

ISSN:0165-0513    

DOI:10.1002/recl.19760950206

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractA synthesis ofbis‐endo‐2‐(hydroxymethyl)‐5‐(4‐imidazolylmethyl)bicyclo [2.22]octane andcis‐1‐(hydroxymethyl)‐4‐(4‐imidazolylmethyl)cyclohexane is reported. Two sequences of reactions representing the formal replacement of halogen by the 4‐imidazolyl gr

ISSN:0165-0513    

DOI:10.1002/recl.19760950207

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractFree radical addition of hydrogen bromide tosyn‐7‐methoxybicyclo[2.2.1]hept‐2‐ene (1) yields mixtures ofexo‐ andendo‐2‐bromo‐syn‐7‐methoxybicyclo[2.2.1]heptanes (2and3). Under ionic conditions products of skeletal rearrangements (4and5) are formed besides2. No indications of 4‐MeO par

ISSN:0165-0513    

DOI:10.1002/recl.19760950208

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY

摘要:

AbstractThe preparation and characterisation of hexakis(imidazole)nickel(II) formate is described. The compound is unique in the sense that it contains formate anions, that are not coordinated to the metal ion. The crystal lattice of this compound ‐ and the isomorphous CoIIand CdIIcompounds ‐ seems to be stabilized by very strong hydrogen bond interactions between the N‐H group of imidazole and the formate anion.A warning is made against the use of the common dehydrating agent triethyl orthoformate, in the presence of ligands that contain protic g

ISSN:0165-0513    

DOI:10.1002/recl.19760950209

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY

ISSN:0165-0513    

DOI:10.1002/recl.19760950201

出版商:WILEY‐VCH Verlag    

年代:1976

数据来源: WILEY