El-Sayed, Ibrahim; Abdel-Megeed, Mohamed F.; Yassin, Salah M., Phosphorus, Sulfur and Silicon and the Related Elements, 1994, vol. 86, # 1.4, p. 239 - 258
Chemistry of Sulfines, Part V: Chemo- and Stereoselective Synthesis and Hetero-Diels–Alder Reactions of Stable Sulfines
作者:Ahmed A. El Gokha、Omar M. Ali、Ibrahim F. Zeid、Takayuki Kudoh、Ibrahim El-Sayed
DOI:10.1080/10426507.2013.800984
日期:2014.1.1
formed upon heating of Z-sulfines during cycloaddition reactions were trapped with 2,3-dimethyl-1,3-butadiene to yield only one of the possible diastereomers of the functionalized cyclic allylic sulfoxides. An X-ray analysis and ab initio calculations were performed to provide insight into the steric course of the oxidation and cycloaddition reactions. [Supplementary materials are available for this article
The compound of the formula (24):
1
wherein R
9
R
10
may be the same or different and each represent a hydrogen atom or a protecting group.
化学式(24)的化合物:其中R9和R10可以相同或不同,且均表示氢原子或保护基。
NEW URETHANES, THIO AND DITHIO ANALOGUES AND THEIR USE AS INHIBITORS OF CHOLESTEROL BIOSYNTHESIS
申请人:——
公开号:US20020019536A1
公开(公告)日:2002-02-14
The present invention relates to urethanes and the thio and dithio analogues thereof of general formula
1
wherein
m, n, A, X, Y and R
1
to R
8
are defined as in claim
1,
the enantiomers, diastereomers and the salts thereof, particularly the physiologically acceptable acid addition salts thereof which have valuable properties, particularly an inhibitory effect on cholesterol biosynthesis, pharmaceutical compositions containing these compounds, their use and processes for preparing them.
A compound having the formula (4):
wherein
1
X is oxygen or sulfur, R
9
and R
10
are each a hydrogen or a protecting group, and R
11
is an aliphatic hydrocarbon, a —COR
12
group where R
12
is alkyl, aryl or alkoxy, or a group of formula
2
wherein R
5
and R
6
are each hydrogen or hydroxyl, m is 1 to 4, and n is 0-2.
Thionothiocarbonates as well as the corresponding selenium compounds are good radicophilic starting materials for the efficient radical chain reactions of alcohols.