6840-31-9Relevant academic research and scientific papers
Photochemical cyclization of the phenalenyl carbanion. The role of benzophenone
Hunter, Duncan H.,Perry, Richard A.
, p. 877 - 877 (1980)
Summary The photocyclization, using visible light, of the phenalenyl anion (2) proceeds in near quantitative yield when benzophenone is added.
Chromium-catalyzed cyclopropanation of alkenes with bromoform in the presence of 2,3,5,6-tetramethyl-1,4-bis(trimethylsilyl)-1,4-dihydropyrazine
Ikeda, Hideaki,Mashima, Kazushi,Nishi, Kohei,Tsurugi, Hayato
, p. 3604 - 3609 (2020/04/21)
Chromium-catalyzed cyclopropanation of alkenes with bromoform was achieved to produce the corresponding bromocyclopropanes. In this catalytic cyclopropanation, an organosilicon reductant, 2,3,5,6-tetramethyl-1,4-bis(trimethylsilyl)-1,4-dihydropyrazine (1a
THERAPEUTIC COMPOUNDS
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Page/Page column 56; 110, (2015/12/11)
Compounds for use in the treatment of human immunodeficiency virus (HIV) infection are disclosed. The compounds have the following Formula (I): including stereoisomers and pharmaceutically acceptable salts thereof, wherein D, V, and R3 are as d
THE BEHAVIOR OF THE SINGLET AND TRIPLET SPIN STATES OF METHYLENE-BRIDGED 1,8-NAPHTHOQUINODIMETHANE WITH O2
Pagni, Richard M.,Burnett, Michael N,,Hassaneen,Hamdi M.
, p. 843 - 851 (2007/10/02)
It has been shown that thermolysis of naphthocyclopropane 8 yields the singlet 1,8-naphthoquinodimethane 7 by disrotatory ring opening.In fluid solution the singlet biradical prefers to ring close to regenerate the starting material rather than under a 1,2-hydrogen shift to yield phenalene (9).It has been demonstrated that the singlet 7 does not react with O2 or undergo intersystem crossing to ground state triplet 7.It has also been shown by an intricate set of experiments that triplet 7 is produced on photolysis of 8 and that it reacts with O2.Unfortunately, it was not possible to elucidate unequivocally the mechanism by which triplet 7 reacts with O2.
Electrocyclic Ring Opening of the 6b,7a-Dihydro-7H-cyclopropacenaphthylene Radical Anion
Dodd, John R.,Pagni, Richard M.,Watson, Charles R.
, p. 1688 - 1692 (2007/10/02)
The Na-K alloy and electrochemical reduction of the naphthocyclopropane 6 were investigated.The radical anion of 6 was found to be very labile and could not be observed spectroscopically.In the Na-K reduction of 6, the phenalenyl radical (9) was detected as an intermediate in the reduction, and the phenalenyl anion (10) and perinaphthane (8) were found to be the products of the reduction.Evidence was obtained from polarographic and cyclic voltammetric studies that 8-10 are also formed in the electrochemical reduction of 6.A mechanism is proposed for this reduction which involves an initial electrocyclic ring opening of the cyclopropane ring in the radical anion of 6 which is followed by a 1,2-shift of hydrogen to yield the radical anion of phenalene (11).The radical anion of 11 is then further transformed into 8 and 10; the latter transformation has previously been reported.
