Stereocontrolled Construction of Either Stereoisomer of 12-Oxatricyclo[6.3.1.02,7]dodecanes Using Prins−Pinacol Reactions
摘要:
12-Oxatricyclo[6.3.1.0(2,7)]dodecanes can be efficiently synthesized in a stereoselective manner by Prins-pinacol reactions. By biasing the transition state of the Prins cyclization, it is possible to access either stereoisomer of this oxatricyclic ring system.
Described herein are compounds that inhibit wild-type RET and its resistant mutants, pharmaceutical compositions including such compounds, and methods of using such compounds and compositions.
本文描述了抑制野生型 RET 及其抗性突变体的化合物、包括此类化合物的药物组合物以及使用此类化合物和组合物的方法。
Decarbonylation of tetrahydrofuran-2-carboxylic acids and tetrahydropyran-2-carboxylic acids in concentrated sulfuric acid: formation of oxonium ions
作者:Hans Aaron Bates
DOI:10.1021/ja00373a025
日期:1982.5
Reactions of Acrolein and Related Compounds. I. Addition of Vinyl Ethers
作者:Curtis W. Smith、Douglas G. Norton、Seaver A. Ballard
DOI:10.1021/ja01155a076
日期:1951.11
Identification of an unexpected 2-oxonia[3,3]sigmatropic rearrangement/aldol pathway in the formation of oxacyclic rings. Total synthesis of (+)-aspergillin PZ
作者:Stephen M. Canham、Larry E. Overman、Paul S. Tanis
DOI:10.1016/j.tet.2011.09.079
日期:2011.12
This paper reports the first unambiguous evidence that the cascade synthesis of tetrahydrofuran-containing oxacyclic molecules depicted in Scheme 12 can take place by a 2-oxonia[3,3]sigmatropic/aldol mechanism rather than by a Prins cyclization/pinacol rearrangement sequence. The 8-oxabicyclo [3.2.1]octyl aldehyde products of this reaction, 20 and 29, were employed to complete the first total synthesis of the structurally remarkable isoindolone alkaloid (+)-aspergillin PZ (1). The lack of activity seen in two tumor cell lines for synthetic (+)-aspergillin PZ calls into question the suggestion that aspergillin PZ, like many aspochalasin diterpenes, might exhibit useful antitumor properties. (C) 2011 Elsevier Ltd. All rights reserved.
JENNER G., HIGH PRESSURE SCI. AND TECHNOL. PROC. 7TH INT. AIRAPT CONT., LE CREUSOT, +