在对二甲苯作为敏化剂的存在下,对环己烯和相应的三烷基硼烷的混合物进行辐照,然后用碱性H 2 O 2连续氧化光解产物,可通过立体选择获得顺式-2-烷基环己醇。1-乙基环己烯的类似反应产生2,2-二烷基环己醇。环庚烯还与硼烷反应以提供顺式-2-烷基环庚醇。通过假定高度应变的反式-环己烯或-庚烯为反应性物质来解释这些反应。光化学产生的反式-环-辛-2-烯酮和顺式,反式-环-辛基-2,7-二烯酮与硼热反应,分别得到3-烷基环辛酮和顺式-7-烷基环辛-2-烯酮。cr啶与硼烷的光反应导致还原性烷基化,以相当好的收率得到9-烷基ac啶。
A mixture of CuCN and N-benzylbenzenesulfonamide catalyzes the 1,4-addition of dialkylzincs or diarylzincs (Cu : Zn = 1 : 200 to 1 : 10000) to α,β-unsaturated ketones to give, after aqueous workup, the corresponding β-substituted ketones in nearly quantitative yields. A range of cyclic enones having s-cis or s-trans geometries as well as conformationally flexible acyclic enones are usable as substrates
3-Arylisothiazoles of the formula I
1
in which the variables X, Q, R
1
, R
2
, R
3
, R
4
, R
5
are as defined in claim 1, and salts thereof, and their use for controlling harmful plants, are described.
Pyrrole-Type compounds, compositions, and methods for treating cancer or viral diseases
申请人:Gemin X Biotechnologies Inc.
公开号:US20040014987A1
公开(公告)日:2004-01-22
The present invention relates to novel Pyrrole-Type compounds, compositions comprising Pyrrole-Type compounds, and methods useful for treating or preventing cancer or a neoplastic disorder comprising administering a composition comprising a Pyrrole-Type compound. The compounds, compositions, and methods of the invention are also useful for inhibiting the growth of a cancer cell or neoplastic cell. The present invention also relates to novel Pyrrole-Type compounds, compositions, and methods useful for treating or preventing a viral infection. The compounds, compositions, and methods of the invention are also useful for inhibiting the replication and/or infectivity of a virus.
Ring Enlargement of<i>α</i>-Ethylidenecycloalkanones to<i>β</i>-Alkylidenecycloalkanones Induced by Trimethylstannyllithium/Aldehyde Equivalents/Lewis Acids
作者:Jun Fujiwara、Jin Tokuyasu、Tadashi Sato
DOI:10.1246/bcsj.68.289
日期:1995.1
α-Ethylidenecycloalkanones underwent a ring enlargement to β-alkylidenecycloalkanones upon a treatment with trimethylstannyllithium/aldehyde equivalents/Lewis acids with high stereoselectivity.
The present invention relates to 2-aryl-5-trifluoromethylpyridines of the formula I
1
in which the variables m, R
1
, R
2
, R
3
, R
4
, R
5
, R
6
and X have the meanings given in claim 1, and their agriculturally tolerated salts.
Moreover, the invention relates to the use of compounds I and their salts as herbicides and/or for the desiccation and/or defoliation of plants, to herbicidal compositions and compositions for the desiccation and/or defoliation of plants comprising the compounds I and/or their salts as active substances.