A simple, tandem approach to the construction of pyridine derivatives under metal-free conditions: a one-step synthesis of the monoterpene natural product, (−)-actinidine
followed by concomitant cyclization through an allenylintermediate to afford pyridines in excellent yields, with water as the sole by-product. This mild strategy is also suitable for functionalization of natural products or other advanced intermediates having α,β-unsaturated carbonyl functionality. The utility of the present protocol was showcased with the synthesis of the monoterpene alkaloid, (−)-actinidine
Condensed cyclic compound and organic light-emitting device including the same
申请人:Samsung Electronics Co., Ltd.
公开号:US10032985B2
公开(公告)日:2018-07-24
A condensed cyclic compound represented by Formula 1:
wherein in Formula 1, Groups X1 to X3, L11, L12, R11, and R12, and variables a11, a12, b11, b12, c11, and c12 are described in the specification.
Methods for preparation of substituted pyridines and related novel compounds
申请人:Watkins Edmond Blake
公开号:US11117893B2
公开(公告)日:2021-09-14
The present invention relates to novel methods of preparation of substituted pyridines and the compounds produced therefrom. In particular, the present invention provides efficient methods for the construction of diversely substituted pyridines, with varying substitution patterns under simple and metal-free conditions with high atom- and pot-economy and excellent functional group tolerance, and which are useful for the synthesis of natural products.
An efficient strategy for the one-pot synthesis of polysubstituted pyridines via a cascade reaction from aldehydes, phosphorus ylides, and propargyl azide is reported. The reaction sequence involves a Wittig reaction, a Staudinger reaction, an aza-Wittig reaction, a 6 pi-3-azatriene electrocyclization, and a 1,3-H shift. This protocol provides quick access to the polysubstituted pyridines from readily available substrates in good to excellent yields.
Prostakov, N. S.; Soldatenkov, A. T.; Krapivko, A. P., Journal of Organic Chemistry USSR (English Translation), 1982, p. 958 - 963
作者:Prostakov, N. S.、Soldatenkov, A. T.、Krapivko, A. P.、Fomichev, A. A.、Mikaya, A. I.、Ustenko, A. A.