Development of an Efficient and Scalable Process of a Respiratory Syncytial Virus Inhibitor
摘要:
An improved process has been developed for compound 1, a respiratory syncytial virus (RSV) inhibitor. This improved process is convergent, safe, efficient, and useful to prepare compound 1 in kilogram quantities.
Catalytic Asymmetric Addition of Alkylzinc and Functionalized Alkylzinc Reagents to Ketones
作者:Sang-Jin Jeon、Hongmei Li、Celina García、Lynne K. LaRochelle、Patrick J. Walsh
DOI:10.1021/jo048683e
日期:2005.1.1
We describe our full report of the catalytic asymmetricaddition of simple and functionalized dialkylzinc reagents to a broad range of saturated ketones and enones. The functionalized organozinc reagents contain esters, silyl ethers, alkyl chlorides, and alkyl bromides. In general, the resulting tertiary alcohol products are isolated with high ee's. With some substrates, yields are low as a result
Improved Procedure for the Synthesis of <i>gem-</i>Diiodoalkanes by the Alkylation of Diiodomethane. Scope and Limitations
作者:James A. Bull、André B. Charette
DOI:10.1021/jo8014616
日期:2008.10.17
employing a convenient modified procedure for the alkylation of NaCHI2 with alkyl iodides. Complete conversion to the diiodide is reliably obtained, avoiding a problematic separation of any remaining iodide starting material. Functional group tolerance toward olefins, acetals, ethers and silyl ethers, carbamates, and hindered esters is demonstrated. The use of an excess of LiCHI2 allows complete conversion
Neopentyl and Neophyl Groups: New Nontransferable Groups for Organocopper and Organozinc Chemistry
作者:Christian Lutz、Philip Jones、Paul Knochel
DOI:10.1055/s-1999-3387
日期:1999.2
Neopentyl and Neophyl groups have been found to be excellent nontransferable groups for organozinc and organocopper chemistry. We have shown that mixed diorganozincs of the type FG-R-Zn(CH2CMe2R) can be used advantageously for the enantioselective addition to aldehydes. These mixed copper or zinc reagents are also found to be very efficient in the Michael addition to various activated alkenes.
A mixture of samarium(II) iodide and samarium can induce a coupling reaction of three molecules of alkanoyl halide to give trialkylcarbinols of 2-hydroxy-1,3-diones. When aliphatic, unbranched alkanoyl chlorides are used, this new coupling reaction provides trimeric products as the main reaction products. Tetrahydropyran (THP) proved superior as the solvent because no ring-opening and subsequent reaction
碘化钐 (II) 和钐的混合物可以诱导三分子烷酰卤的偶联反应,生成 2-羟基-1,3-二酮的三烷基甲醇。当使用脂肪族无支链烷酰氯时,这种新的偶联反应提供了三聚产物作为主要反应产物。四氢吡喃 (THP) 作为溶剂被证明是优越的,因为在反应条件下没有观察到开环和随后与烷酰卤的反应,这与使用 THF 时不同。
Synthesis of n-alkyl terminal halohydrin esters from acid halides and cyclic ethers or thioethers under solvent- and catalyst-free conditions
efficient and eco-friendly protocol has been developed for the preparation of n-alkyl terminal halohydrin esters under solvent- and catalyst-free conditions. Ring opening of cyclic ethers by organic acid halides affords the 1,4- and 1,5-halohydrins, OH-protected by different acyl groups. The green reaction conditions, simple work-up procedures, high yields and broad substrate scope of the reaction highlight