93-89-0Relevant articles and documents
Bender
, p. 1626,1628 (1951)
Ester Interchange Reaction Catalyzed by Lanthanoid Tri-2-propoxides
Okano, Tamon,Hayashizaki, Yugo,Kiji, Jitsuo
, p. 1863 - 1865 (1993)
Lanthanoid tri-2-propoxides (i)3>n Ln = La, Nd, Gd, Yb) are active catalysts for the interchange reaction of the alkoxyl groups between two kinds of esters.The La catalyst is the most active among them, and the activity is higher in nonpolar solvents than in polar ones.The La catalyst is applicable to the ring-opening polymerization of 6-hexanolide.
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Vernon,Brown
, p. 534 (1940)
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7,8,9-trimethyl-1-phenyl-3H-pyrrolo[2,1-d][1,2,5]triazepin-4(5H)-one. Synthesis and reactions
Kharaneko
, p. 738 - 745 (2017)
A strategy was developed for the synthesis of 7,8,9-trimethyl-1-phenyl-3H-pyrrolo[2,1-d][1,2,5]-triazepin-4(5H)-one, reactions of its functionalization at the С4 atom and aza rings fusion at the С4?N3 bond were explored. The formation mechanism of the pyrrolo-1,2,5-triazepinone scaffold was suggested.
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Kailan
, p. 543 (1906)
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Production of Copolyester Monomers from Plant-Based Acrylate and Acetaldehyde
Yuan, Lin,Hu, Yancheng,Zhao, Zhitong,Li, Guangyi,Wang, Aiqin,Cong, Yu,Wang, Feng,Zhang, Tao,Li, Ning
supporting information, (2021/12/14)
PCTA is an important copolyester that has been widely used in our daily necessities. Currently, its monomers are industrially produced from petroleum-derived xylene. To reduce the reliance on fossil energy, we herein disclose an alternative route to acces
PCl3-mediated transesterification and aminolysis of tert-butyl esters via acid chloride formation
Wu, Xiaofang,Zhou, Lei,Li, Fangshao,Xiao, Jing
, p. 491 - 497 (2021/01/20)
A PCl3-mediated conversion of tert-butyl esters into esters and amides in one-pot under air is developed. This novel protocol is highlighted by the synthesis of skeletons of bioactive molecules and gram-scale reactions. Mechanistic studies revealed that this transformation involves the formation of an acid chloride in situ, which is followed by reactions with alcohols or amines to afford the desired products.
Remarkably Efficient Iridium Catalysts for Directed C(sp2)-H and C(sp3)-H Borylation of Diverse Classes of Substrates
Chattopadhyay, Buddhadeb,Hassan, Mirja Md Mahamudul,Hoque, Md Emdadul
supporting information, p. 5022 - 5037 (2021/05/04)
Here we describe the discovery of a new class of C-H borylation catalysts and their use for regioselective C-H borylation of aromatic, heteroaromatic, and aliphatic systems. The new catalysts have Ir-C(thienyl) or Ir-C(furyl) anionic ligands instead of the diamine-type neutral chelating ligands used in the standard C-H borylation conditions. It is reported that the employment of these newly discovered catalysts show excellent reactivity and ortho-selectivity for diverse classes of aromatic substrates with high isolated yields. Moreover, the catalysts proved to be efficient for a wide number of aliphatic substrates for selective C(sp3)-H bond borylations. Heterocyclic molecules are selectively borylated using the inherently elevated reactivity of the C-H bonds. A number of late-stage C-H functionalization have been described using the same catalysts. Furthermore, we show that one of the catalysts could be used even in open air for the C(sp2)-H and C(sp3)-H borylations enabling the method more general. Preliminary mechanistic studies suggest that the active catalytic intermediate is the Ir(bis)boryl complex, and the attached ligand acts as bidentate ligand. Collectively, this study underlines the discovery of new class of C-H borylation catalysts that should find wide application in the context of C-H functionalization chemistry.