Zobrazeno 1 - 10
of 124
pro vyhledávání: '"Sever Sternhell"'
Publikováno v:
Tetrahedron. 55:3615-3624
Methyl-silicon bond cleavage of tetramethylsilane occurs with aryllead(IV) tricarboxylates in trifluoroacetic acid to produce aryl(methyl)lead(IV) bistrifluoroacetates in high yield. An extension of the study to tetraalkylstannanes has shown that alk
Publikováno v:
Tetrahedron. 53:4051-4062
Aromatic hydrocarbons (biphenyl, naphthalene, anthracene and phenanthrene) were subjected to ball milling (SPEX® 8000) with approximately ten-fold weight of inorganic materials (alumina or silica). After about 24 h all of the hydrocarbons were conve
Publikováno v:
The Journal of Organic Chemistry. 62:62-66
Reduction of trans-5,5,6a,7,8,12b-hexahydro-1,12-dimethylbenzo[c]phenanthrene-5,8-dione (1, R(1) = R(4) = H, R(2) = R(3) = CH(3)) with lithium aluminum hydride yielded stereoselectively (5RS,8RS)-trans-5,6,6a,7,8,12b-hexahydro-1,12-dimethylbenzo[c]ph
Publikováno v:
ChemInform. 23
Fifty-seven values for the ortho-benzylic coupling constant 4JMeCCH (henceforth denoted as 4JOB) were obtained for a variety of heteroaromatic systems. It was shown that a good correlation exists between 4JOB when the methyl group is not α to the he
Autor:
Kazuya Kobiro, Trevor W. Hambley, Kiyomi Kakiuchi, Sever Sternhell, C. W. Tansey, Yoshito Tobe, Jill E. Gready
Publikováno v:
ChemInform. 22
Publikováno v:
ChemInform. 23
Publikováno v:
ChemInform. 27
Synthetic routes based on Newman's1-7 synthesis of a number of polycyclic aromatic hydrocarbons were modified and developed to give a convenient preparation (Scheme 1) of 11 helical molecules formally based on hexalindione (1). In contrast to Newman'
Publikováno v:
Journal of Heterocyclic Chemistry. 29:935-946
Fifty-seven values for the ortho-benzylic coupling constant 4JMeCCH (henceforth denoted as 4JOB) were obtained for a variety of heteroaromatic systems. It was shown that a good correlation exists between 4JOB when the methyl group is not α to the he
Publikováno v:
Journal of the American Chemical Society. 114:3266-3272
The allylic interproton spin-spin coupling constant, 4 J(CH 3 C=CH) ( 4 J Me,H ), which has previously been established as a sensitive probe of bond order, was measured in a range of free-base porphyrins and metallo-2-methylporphyrins. The measured r
Publikováno v:
The Journal of Organic Chemistry. 57:1833-1837
A study of the position of tautomeric equilibrium in deuteroporphyrin IX methyl ester (3) and monosubstituted derivatives 4-7 using variable-temperature studies on the N,N-dideuteriated derivatives 8-12 is reported. The kinetic isotope effect on the