493-10-7Relevant articles and documents
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Tsuda et al.
, p. 1481,1484 (1956)
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Activating Imides with Triflic Acid: A General Intramolecular Aldol Condensation Strategy Toward Indolizidine, Quinolizidine, and Valmerin Alkaloids
Quevedo-Acosta, Yovanny,Jurberg, Igor D.,Gamba-Sánchez, Diego
supporting information, p. 239 - 243 (2020/01/02)
A simple, inexpensive, step economic, and highly modular synthetic strategy to access izidine alkaloids is described. The key step is a TfOH-promoted intramolecular aldol condensation between enol and cyclic imide moieties. This cyclization strategy can be employed within an aza-Robinson annulation framework and represents a general tool to build fused bicyclic amines. To illustrate the power of this method, we describe the preparation of (±)-coniceine, (±)-quinolizidine, (±)-tashiromine, (±)-epilupinine, and the core of (±)-valmerins.
ELECTROLYTE, ELECTROLYTIC SOLUTION, AND ELECTROCHEMICAL DEVICE USING THE SAME
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, (2010/04/30)
Disclosed herein is an electrolyte having excellent long-term reliability, a high withstanding voltage (a wide potential window), and high conductivity. The electrolyte contains a quaternary ammonium salt represented by the following general formula (1): wherein R1 represents a hydrocarbon group; R2 represents a hydrocarbon group, a hydrogen atom, or a halogen atom; R3 to R14 each represent an alkyl group, a fluoroalkyl group, a hydrogen atom or a halogen atom, C and C* each represent a carbon atom, N represents a nitrogen atom; h, i, j, x, y, and z are each an integer of 0 to 6, (h+x) is an integer of 0 to 6, (i+y) and (j+z) are each an integer of 1 to 6; and X? represents a counter anion having a HOMO energy of ?0.60 to ?0.20 a.u. as determined by the first-principle calculation on molecular orbital of the counter anion.
Multialkylation of aqueous ammonia with alcohols catalyzed by water-soluble Cp*Ir-ammine complexes
Kawahara, Ryoko,Fujita, Ken-Ichi,Yamaguchi, Ryohei
supporting information; experimental part, p. 15108 - 15111 (2010/12/24)
Novel water-soluble Cp*Ir-ammine complexes have been synthesized, and a new and highly atom-economical system for the synthesis of organic amines using aqueous ammonia as a nitrogen source has been developed. With a water-soluble and air-stable Cp*Ir-ammine catalyst, [Cp*Ir(NH 3)3][I]2, a variety of tertiary and secondary amines were synthesized by the multialkylation of aqueous ammonia with theoretical equivalents of primary and secondary alcohols. The catalyst could be recycled by a facile procedure maintaining high activity. A one-flask synthesis of quinolizidine starting with 1,5,9-nonanetriol was also demonstrated. This new catalytic system would provide a practical and environmentally benign methodology for the synthesis of various organic amines.