已经建立了Cp * Rh III催化的N-芳氧基乙酰胺的CH活化触发的具有挑战性的1,1-二取代烯烃的环状碳氧加合反应,该化合物可以在良好的收率下,以良好的收率提供具有季碳中心的2,3-二氢苯并呋喃衍生物。轻度氧化还原中性条件。烯烃上的酰胺基对于该过程至关重要,并且可能通过配位使铑中心饱和而抑制C(sp3-)-Rh物种中β-H的消除。此外,从控制实验中获得的机械学见解表明,涉及一种Rh III -Rh V -Rh III催化循环的机理。
已经建立了Cp * Rh III催化的N-芳氧基乙酰胺的CH活化触发的具有挑战性的1,1-二取代烯烃的环状碳氧加合反应,该化合物可以在良好的收率下,以良好的收率提供具有季碳中心的2,3-二氢苯并呋喃衍生物。轻度氧化还原中性条件。烯烃上的酰胺基对于该过程至关重要,并且可能通过配位使铑中心饱和而抑制C(sp3-)-Rh物种中β-H的消除。此外,从控制实验中获得的机械学见解表明,涉及一种Rh III -Rh V -Rh III催化循环的机理。
The present invention relates to novel pyridone derivatives capable of inhibiting α
4
integrin mediated cell adhesion, processes for their preparation, compositions comprising them and their use in the treatment of diseases capable of being modulated by the inhibition of cell adhesion.
Structurally diverse β-silyl-α-amino acid compounds were prepared via visible-light-induced metal-free hydrosilylation of dehydroalanines and hydrosilanes.
Building assembly including a weather resistant barrier, a sheet for use as a weather resistant barrier, a liquid coating composition and methods of making the foregoing
申请人:CERTAINTEED CORPORATION
公开号:US10167627B2
公开(公告)日:2019-01-01
A weather resistive barrier (WRB) for the exterior protection of building substrates can have a water vapor permeability that decreases with increasing temperature. In an embodiment, the WRB includes a coating comprising a LCST polymer, and may further include a second polymer. The WRB can be part of a building assembly, part of a sheet, or a sheet itself, the sheet having an air permeability of less than 0.02 L/(s m2) at a pressure of 75 Pa. Furthermore a liquid coating composition can include a LCST polymer and a second polymer, wherein the liquid coating composition can be adapted that a solid coating formed by the liquid coating composition has an air permeability of less than 0.02 L/(s m2) at a pressure of 75 Pa and a water vapor permeability that decreases with increasing temperature.
用于建筑基材外部保护的耐候屏障(WRB)可以具有随温度升高而降低的水蒸气渗透性。在一个实施例中,WRB 包括一种由 LCST 聚合物组成的涂层,还可进一步包括第二种聚合物。WRB 可以是建筑组件的一部分、板材的一部分或板材本身,板材在 75 Pa 压力下的透气性小于 0.02 L/(s m2)。此外,液态涂层组合物可以包括一种 LCST 聚合物和一种第二种聚合物,其中液态涂层组合物可以使液态涂层组合物形成的固体涂层在 75 Pa 压力下具有小于 0.02 L/(s m2) 的透气性和随温度升高而降低的水蒸气渗透性。
Selective capture and stimulated release of circulating tumor cells on nanostructured devices
申请人:The Regents of the University of California
公开号:US10444233B2
公开(公告)日:2019-10-15
A device for capturing preselected cell types from a fluid sample that includes a plurality of cell types includes a substrate, a plurality of nanowires at least one of attached to or integral with a surface of the substrate such that each nanowire of the plurality of nanowires has an unattached end, and a layer of temperature-responsive material formed on at least the unattached end of each of the plurality of nanowires. The layer of temperature-responsive material has a compact configuration at a first temperature and an expanded configuration at a second temperature so as to facilitate release of cells captured at the first temperature to be released at the second temperature.
Functionalized solid particles for sequestering metal ions
申请人:International Business Machines Corporation
公开号:US10800671B2
公开(公告)日:2020-10-13
Metal ion sequestering particles were formed in a one-pot single step synthesis by azeotropically removing water while heating a reaction mixture containing a branched poly(ethylenimine), poly(acrylic acid), di-(2-picolylamine), a catalytic amount of N,N-duimethylformamide, toluene, and either glycine or a carboxy-terminated poly(N-isopropylacrylamide). No other catalyst was present. The branched and crosslinked particles formed using the poly(N-isopropylacrylamide) sequestered metal ion from water at ambient temperature and released the bound metal ion upon heating.