Radical Couplings as Key Steps for the Preparation of Derivatives of Nonactic Acid
摘要:
Free radical couplings from furan, as cheap starting material, were studied in view of developing a rapid strategy en route to the synthesis of derivatives of nonactin. The chain containing the alcohol function was introduced in one or two steps in 86% yield. For the introduction of the second chain with the ester function two different coupling methods were tested. Starting from the advanced intermediates obtained nonactin derivatives can be prepared by catalytic hydrogenation of the furan ring.
A malonylation/decarbalkoxylation sequence from 2-substituted furans was investigated in view of developing a scalable synthesis of hydrophobic nonactic acid analogues.
考虑到开发疏水性非乳酸类似物的可扩展合成,研究了来自2-取代的呋喃的丙二酰化/脱羧烷氧基化序列。
Tobacco-derived casing composition
申请人:R.J. Reynolds Tobacco Company
公开号:US10159273B2
公开(公告)日:2018-12-25
The invention provides a tobacco composition for use in a smoking article or a smokeless tobacco composition that comprises an extract derived from a component of a plant of the Nicotiana species. The invention also provides smoking articles and smokeless tobacco compositions that include the extracts described herein, and methods for preparing extracts derived from a component of a plant of the Nicotiana species for addition to a tobacco composition.