Optically Active Di- and Tetra-methyl-spiro-5 : 5-Dihydantoins
نویسندگان
چکیده
منابع مشابه
1′-Benzyl-4,4′′-bis(4-chlorophenyl)-3-(2,6-dichlorophenyl)-1′′-methyl-4,5-dihydroisoxazole-5-spiro-3′-piperidine-5′-spiro-3′′-pyrrolidine-2′′-spiro-3′′′-indoline-2′′′,4′-dione
The asymmetric unit of the title compound, C(43)H(34)Cl(4)N(4)O(3), contains two crystallographically independent mol-ecules. In both mol-ecules, the pyrrolidine ring adopts a twist conformation, the oxindole units are slightly distorted from planarity and the isoxazoline ring adopts an envelope conformation. The crystal structure is stabilized by N-H⋯O hydrogen-bonding inter-actions giving one...
متن کاملSynthesis of (4',5'-diaza-9'-fluorene)-spiro-5-hydantoin
Synthesis of (4',5'-diaza-9'-fluorene)-spiro-5-hydantoin: The paper presents a method for synthesis of (4',5'-diaza-9'-fluorene)-spiro-5-hydantoin. The newly obtained compound was synthesized by a treatment of 4,5-diazafluoren-9-one with sodium cyanide, ammonium carbonate, ethanol and ammonium hydroxide at high pressure and high temperature. The structure of (4',5'-diaza-9'-fluorene)-spiro-5-hy...
متن کامل5-(2-Methyl-5-nitrophenyl)-1H-tetrazole
In the title compound, C(8)H(7)N(5)O(2), the benzene ring makes a dihedral angle of 45.7 (2)° with the tetra-zole ring. In the crystal structure, the mol-ecules are linked into a chain running along the a axis by N-H⋯N hydrogen bonds, and the chains are linked through π-π inter-actions between the tetra-zole rings [centroid-centroid distance = 3.450 (2) Å].
متن کامل2-Methyl-5-nitrobenzenesulfonamide
In the title compound, C(7)H(8)N(2)O(4)S, the nitro group is twisted by 9.61 (2)° relative to the benzene ring. In the crystal, mol-ecules are linked by N-H⋯O and N-H⋯(O,O) hydrogen bonds between the amino and sulfonyl groups, forming layers parallel to (001).
متن کامل2-Methyl-5-nitrobenzonitrile
In the title compound, C(8)H(6)N(2)O(2), the nitro group is rotated by 10.2 (2)° out of the plane of the benzene ring. The crystal structure is stabilized by van der Waals inter-actions.
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ژورنال
عنوان ژورنال: Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
سال: 1936
ISSN: 1364-5021,1471-2946
DOI: 10.1098/rspa.1936.0080