Photochemical behavior of 2,5-di-tert-butyl-3H-azepine: unexpected formation of a dicyclopenta[b,e]pyridine derivative and a cis,cis-cyclodeca-1,6-diene derivative

2001 ◽  
pp. 1382-1383 ◽  
Author(s):  
Kyosuke Satake ◽  
Yuko Tawada ◽  
Shizuka Takami ◽  
Masaru Kimura
Keyword(s):  
Pyridine Derivative ◽  
Unexpected Formation ◽  
Photochemical Behavior ◽  
Tert Butyl

Photochemical Behavior of a New Long-chain UV Absorber† Drived from 4-tert-Butyl-4′-Methoxydibenzoylmethane¶

2007 ◽  
Vol 80 (2) ◽  
pp. 316-321
Author(s):  
Fabienne Wetz ◽  
Corinne Routaboul ◽  
Dominique Lavabre ◽  
Jean-Christophe Garrigues ◽  
Isabelle Rico-Lattes ◽  
...  
Keyword(s):  
Photochemical Behavior ◽  
Tert Butyl ◽  
Uv Absorber ◽  
Long Chain

scholarly journals New Spiro-Tin Compounds: Reaction of N,N′-Dialkyl Sulfur Diimides with Cyclic Bis(amino)stannylenes - Unexpected Formation of a N-N Bond

1995 ◽  
Vol 50 (12) ◽  
pp. 1811-1817 ◽  
Author(s):  
Max Herberhold ◽  
Christian Köhler ◽  
Wolfgang Milius ◽  
Bernd Wrackmeyer
Keyword(s):  
Molecular Structure ◽  
Magnetic Resonance ◽  
Single Crystal ◽  
Structure Analysis ◽  
Membered Ring ◽  
Monoclinic Space Group ◽  
Unexpected Formation ◽  
Tin Compounds ◽  
X Ray ◽  
Tert Butyl

N,N′-Dialkyl sulfur diimides (1), R(NSN)R [R = Me (a), Et (b), nPr (c), nBu (d)] react with cyclic bis(amino)stannylenes such as 1,3-di-tert-butyl-4,4-dimethyl-1,3,4,2λ2-diazasilastannetedine (2) or 1,3-di-tert-butyl-4,4,5,5-tetramethyl-1,3,4,5,2λ2-diazadisilastannolidine (3) in a 2:1 ratio to give the new spiro-tin(IV) compounds 5a-d, 6b and 6c, built from the respective cyclic bis(amino)stannylene and a seven-membered ring in which the two sulfur diimide groups are coupled via a N-N bond and across the tin atom. A 1:1 adduct 4 is proposed as an intermediate which is the final product 4e in the case of R = tBu (1e). The products were characterized by multinuclear magnetic resonance (1H, 13C, 15N, 29Si, 119Sn NMR), and in the case of 5c the molecular structure was determined by single crystal X-ray structure analysis [monoclinic, space group C2/c ; a = 1504.1(3), b = 1393.3(3), c = 1688.6(3) pm; β = 115.71(3)°].

scholarly journals tert-Butyl 3-(3-methyl-1-oxidopyridin-1-ium-2-yl)benzoate

IUCrData ◽  
2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Gerhard Laus ◽  
Volker Kahlenberg ◽  
Sven Nerdinger ◽  
Frank Richter ◽  
Herwig Schottenberger
Keyword(s):  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Cyclic Dimer ◽  
Pyridine Derivative ◽  
Tert Butyl ◽  
Compound C ◽  
Sheet Structure ◽  
Ring Centroid

In the title compound, C17H19NO3, which was obtained by oxidation of the corresponding pyridine derivative, the dihedral angle between the benzene and the pyridine rings is 68.2 (1)°. In the crystal, C—H...O hydrogen bonds to carboxyl andN-oxide O-atom acceptors gives a cyclic dimer substructure with anR22(18) motif which is extended into a undulating sheet structure lying parallel to (100) through weak C—H...Ooxidehydrogen bonds. Also present are π–π ring interactions [ring centroid separation = 3.561 (2) Å].

Reaction of some nucleophiles with 2,6-di-tert-butylpyrylium perchlorate

1987 ◽  
Vol 52 (5) ◽  
pp. 1305-1314 ◽  
Author(s):  
Stanislav Böhm ◽  
Renata Prantová ◽  
David Šaman ◽  
Petr Trška ◽  
Josef Kuthan
Keyword(s):  
Hydrogen Sulfide ◽  
Sodium Borohydride ◽  
Ammonium Acetate ◽  
Sodium Cyanide ◽  
Pyridine Derivative ◽  
Similar Reaction ◽  
Subsequent Reaction ◽  
Tert Butyl ◽  
Electrophilic Reagents ◽  
Pyran Derivative

The title compound IV reacted with sodium borohydride to give the 4H-pyran VIIa and the dienone VIIIa whereas its reaction with sodium cyanide afforded exclusively the dienone VIIIb. Reaction of the salt IV with tert-butylmagnesium chloride or bromide gave a mixture of the 4H-pyran VIIa and the corresponding 4-tert-butyl derivative V. Upon treatment with hydrogen sulfide and hydrogen chloride, this mixture afforded 2,4,6-tri-tert-butyl-4H-thiopyran XI whereas aromatization with chloranil and subsequent reaction with ammonium acetate resulted in 2,4,6-tri-tert-butylpyridine (X). Analogously, the perchlorate IV reacted with ammonium acetate to give 2,6-di-tert-butylpyridine (VI). Addition of triphenylphosphine and potassium phthalimide to IV afforded exclusively the 4H-pyran derivatives XII and XIII. A similar reaction of nitromethyl anion led to the 4,4'-bis(4H-pyran) derivative XIV. Mechanism of the studied reactions and the reasons for the low reactivity of the sterically hindered pyridine derivative VI with electrophilic reagents are discussed.

Photochemical Behavior of a New Long-chain UV Absorber† Derived from 4-tert-Butyl-4′-Methoxydibenzoylmethane¶

2004 ◽  
Vol 80 (2) ◽  
pp. 316 ◽  
Author(s):  
Fabienne Wetz ◽  
Corinne Routaboul ◽  
Dominique Lavabre ◽  
Jean-Christophe Garrigues ◽  
Isabelle Rico-Lattes ◽  
...  
Keyword(s):  
Photochemical Behavior ◽  
Tert Butyl ◽  
Uv Absorber ◽  
Long Chain
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