排序方式: 共有3条查询结果,搜索用时 15 毫秒
1
1.
Hanrahan JR Mewett KN Chebib M Matos S Eliopoulos CT Crean C Kumar RJ Burden P Johnston GA 《Organic & biomolecular chemistry》2006,4(13):2642-2649
A divergent synthesis of both diastereoisomers of (+/-)-(3-aminocyclopentane)alkylphosphinic acid is described. Both diastereoisomers are obtained in 5 steps from the key (+/-)-(3-hydroxycyclopent-1-ene)alkylphosphinate esters which are prepared via a palladium catalysed C-P bond forming reaction. 相似文献
2.
Given a regular –-hermitian form on an n-dimensional vector space V over a commutative field K of characteristic 2 (
). Call an element of the unitary group a quasi-involution if is a product of commuting quasi-symmetries (a quasi-symmetry is a unitary transformation with a regular (n–1)-dimensional fixed space). In the special case of an orthogonal group every quasi-involution is an involution. Result: every unitary element is a product of five quasi-involutions. If K is algebraically closed then three quasi-involutions suffice. 相似文献
3.
Joanne H Gibson Barry Slobedman Harikrishnan KN Sarah L Williamson Dimitri Minchenko Assam El-Osta Joshua L Stern John Christodoulou 《BMC neuroscience》2010,11(1):53
Background
The Rett Syndrome (RTT) brain displays regional histopathology and volumetric reduction, with frontal cortex showing such abnormalities, whereas the occipital cortex is relatively less affected. 相似文献
1