Contrasting reactivity in Lewis acid-promoted reactions of thio- and silyl-allenes with 1,4-benzoquinones
作者:Thomas A. Engler、Konstantinos Agrios、Jayachandra P. Reddy、Rajesh Iyengar
DOI:10.1016/0040-4039(95)02164-7
日期:1996.1
In Ti(IV)-promoted reactions with 2-methoxy-1,4-benzoquinones 3, thioallenes 1 give 2+2 and/or 3+2 products via attack on a CC moiety of the quinone, whereas silylallene 2 gives products derived from attack on a carbonyl group of the quinone.
Instillation cartridge for vacuum actuated fluid delivery
申请人:KCI Licensing, Inc.
公开号:US10124095B2
公开(公告)日:2018-11-13
A fluid delivery system, method, and apparatus for providing instillation therapy with a negative-pressure source is described. The apparatus includes a housing having an ambient chamber and a negative-pressure chamber fluidly isolated from each other. The apparatus also includes a moveable barrier disposed in the housing between the ambient chamber and the negative-pressure chamber. The moveable barrier is operable to move between a charge position and a discharge position in response to negative pressure. A fluid source is disposed in the negative-pressure chamber and is collapsible in response to movement of the moveable barrier to the discharge position. The apparatus also includes a fluid outlet in fluid communication with the fluid source, a negative-pressure port in fluid communication with the negative-pressure chamber and configured to be coupled to a negative-pressure source, and a vent formed in the housing and fluidly coupled to the ambient chamber.