Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Richard J. Cremlyn"'
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 178:1931-1941
Attempts to chlorosulfonate 1,4-diphenyl-1,3-diazetidin-2-one (1) failed, but the 3-methyl derivative (2) reacted with chlorosulfonic acid to give the bis-sulfonyl chloride (3), characterized as the sulfonamides 4 and 5. 2,3,6-Triphenyl-2,3-dihydro-1
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 161:213-238
Reaction of chlorosulfonyl isocyanate (1) with arylaldehyde azines (7) gave the 2:1 crisscross adducts (8);attempts to prepare a disulphonamide of 8a gave only a mixture of the monosulfamide 9 and ...
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 142:83-91
Styrylpyridine (1) reacted with chlorosulfonic acid (6 mole equivalents) and excess thionyl chloride to the give the corresponding para sulfonyl chloride, which was characterized as the N,N-dimethyl sulfonamide. The pyridine ring appeared to deactiva
Publikováno v:
Pesticide Science. 52:70-74
A series of 11 N-(p-sulfonylphenyl)-N 1 -carbamoylureas was prepared by reaction of 1,6-diphenyl-2,4-dioxohexahydro-s-triazine with chlorosulfonic acid and thionyl chloride. The resultant N-(p-chlorosulfonylphenyl)-N 1 -carbamoylurea was subsequently
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 122:87-100
The dipolar cycloadducts from diaryl azines and maleimides (1, 20) or maleic anhydride (18) have been reacted with chlorosulfonic acid to give the bis- (2, 19) or tetrachlorosulfonyl derivatives (21). The chorosulfonation generally required addition
Publikováno v:
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 52:1423-1432
A detailed study of the 270 MHz 1 H and 67 MHz 13 C NMR spectra of dimedone is reported. J CH coupling constants for the keto and enol forms are presented. In CDCl 3 solution, the C-4 and C-6 carbons of the bulk polymeric enol tautomer are equivalent
Publikováno v:
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 52:1433-1454
A detailed study of the 270 MHz 1H and 67 MHz 13C NMR spectra of four series of dimedone adducts and “anhydrides” is presented. A valuable 5JHH homoallylic coupling has been identified which has facilitated signal locations utilising 2D HETCOR an
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 107:205-217
A series of diarylidene and heteroarylidene ketones (1–20) was prepared using alicyclic ketones ((CH2)nC=O where n = 3 to 7). An improved synthesis of 2,4-dibenzylidenecyclobutanone (1) is described and the ease of preparation of the arylidene deri
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 97:199-207
A new improved synthesis of 3-benzylidenecamphor (1) is described; the procedure has also been applied to the conversion of isopinocamphorone (4) into 4-benzylidenepinocamphorone (6a). In the latter reaction, 1H NMR spectral data and X-ray crystallog
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 92:65-75
2-Styrylbenzothiazole (1), 2-styryl (2)- and 2-phenylbenzoxazole (3) reacted with excess chlorosulfonic acid (6 equivalents) to give the sulfonyl chlorides (8, 14, 20). The pure sulfonyl chlorides were not isolated and were characterised by conversio