16029-98-4Relevant articles and documents
Evidence for an oxygen anthracene sandwich complex
Klaper, Matthias,Linker, Torsten
, p. 11896 - 11899 (2013)
Oxygen sticks in between acenes: The rate of the photooxygenation of bis(anthryl)alkanes with singlet oxygen shows a maximum for a defined chain length (n=4). In combination with calculations, a bathochromic shift of the UV/Vis absorption for only one endoperoxide and a CT absorption band, this gives considerable evidence for an oxygen anthracene sandwich complex. Copyright
N-aminomethylation vs. C-aminomethylation of indole and pyrrole with an N,O-acetal controlled by the hardness of a counter ion of an iminium compound
Sakai, Norio,Okano, Hidetoshi,Shimamura, Kazuyori,Konakahara, Takeo
, p. 501 - 503 (2014)
Under relatively strong Lewis acidic conditions (a softer counter ion) using TMSOTf and TMSI, the aminomethylation of indole or pyrrole with a typical N,O-acetal preferentially produced the kinetically favored N-aminomethylated indole or pyrrole derivative. Use of a relatively weak Lewis acid (a harder counter ion), such as TMSCl and TMSBr, preferentially produced the thermodynamically favored C-aminomethylated indole and pyrrole derivative.
Evaluation of aroma-active compounds in Pontianak orange peel oil (Citrus nobilis Lour. var. microcarpa Hassk.) by gas chromatography-olfactometry, aroma reconstitution, and omission test
Dharmawan, Jorry,Kasapis, Stefan,Sriramula, Praveena,Lear, Martin J.,Curran, Philip
, p. 239 - 244 (2009)
The aroma-active compounds of Pontianak orange peel oil (Citrus nobilis Lour. var. microcarpa Hassk.) were characterized by using gas chromatography-olfactometry (GC-O) and aroma extract dilution analysis (AEDA) techniques. Forty-one compounds were found to be aroma-active, which were mainly dominated by saturated and unsaturated aldehydes. The flavor dilution (FD) factor was within the range of 2-2048, and compounds having the highest FD factor were α-pinene, β-pinene, linalool, and 2-methoxy-3-(2- methylpropyl) pyrazine, including a few unknown compounds. On the basis of GC-O results, odor activity value (OAV) and relative flavor activity (RFA) were determined for aroma model reconstitution. These resembled the original aroma of the peel oil for the green, fatty, fresh, peely, floral, and tarry attributes, with the model solution derived from OAV being the closest to Pontianak oil. Omission tests were carried out to verify the significance of (Z)-5-dodecenal and 1-phenylethyl mercaptan as key compounds in the aroma of Pontianak orange peel oil.
Unsupported metal silyl ether coordination
Pahl, Jürgen,Elsen, Holger,Friedrich, Alexander,Harder, Sjoerd
, p. 7846 - 7849 (2018)
Simple silyl ethers like O(SiMe3)2 in contrast to normal ethers are inert to metal bonding; however, a “naked”, highly Lewis-acidic, cationic Mg species enforces complexation. DFT calculations indicate that agostic interactions and van der Waals attraction significantly contribute to the stability of this first example of unsupported metal silyl ether coordination.
Balcombe et al.
, p. 1353,1354-1357 (1975)
The Ring Opening Reaction of Cyclopolysilanes, (R2Si)n (n=3-6), with Iodine. A Kinetic Study
Watanabe, Hamao,Shimoyama, Hiromi,Muraoka, Tsutomu,Kougo, Yuichi,Kato, Motohiko,Nagai, Yoichiro
, p. 769 - 770 (1987)
Reactions of a series of peralkylcyclopolysilanes with iodine were found to proceed via second-order kinetics.Rate constans show that, in general, the smaller rings react faster than larger rings.Values of the activation parameters, Ea and ΔG, decreased with the decreasing ring size and are parallel with those of the oxidation potentials and of the transition energies.
Finkelstein Reaction in Non-polar Organic Solvents: A Streamlined Synthesis of Organic Iodides
Takahashi, Yusuke,Seki, Masahiko
, p. 1974 - 1978 (2021)
The Finkelstein reaction of organic halides was found to proceed smoothly in non-polar organic solvents other than acetone when operated in the presence of a catalytic amount of tetra-n-butylammonium bromide and water. The new protocol was successfully applied to a preparation of ethyl 5-iodopentanoate from the corresponding bromide which was used directly for zinc reagent formation and Fukuyama coupling to enable the formation of the (+)-biotin side chain in a streamlined manner. Rate acceleration by microwave irradiation and an application to the synthesis of trimethylsilyl iodide will be described as well.
-
Hundeck
, p. 23,26 (1966)
-
METHOD FOR PRODUCING IODOTRIALKYLSILANE COMPOUND
-
Paragraph 0059-0064, (2021/06/04)
PROBLEM TO BE SOLVED: To provide a method for producing iodotrialkylsilane compounds that can be produced stably even in various organic solvents. SOLUTION: A method for producing an iodotrialkylsilane compound (2A) includes bringing a halogenated trialkylsilane compound (1A) into contact with an alkali iodide metal salt in an organic solvent for a reaction to occur between them (X is F, Cl, or Br). SELECTED DRAWING: None COPYRIGHT: (C)2021,JPOandINPIT