5,5′-bis(trifluoromethyl)-2,2′-bipyridine (4, 12 mol%), N-fluorobenzenesulfonimide (NFSI, 1.3 equiv), Ag2O (1.0 equiv) 和 5 Å分子筛存在下,以二氯甲烷为溶剂,在空气氛围中100 °C反应1小时,可以以80%的产率得到苯并环丁烯产物3a。
无论是bis-BocDha-OEt、bis-Boc-Dha-OPh以及邻苯二甲酰亚胺保护的脱氢氨基酸,皆可以顺利的进行酰基化加成。当以手性的异噁唑烷酮作为底物时,可以得到单一构型(dr.>20:1)的手性氨基酸衍生物(4e-4h’)。对于三肽的光化学酰化加成(包括Ac-Leu-Ser-Phe-OMe、Boc-Leu-Ser-Phe-OMe和Boc-Phe-Ser-Phe-OMe),在...
Die schwere Tandemwalze ist mit zwei redundanten Wasserpumpen ausgestattet. Der große Wassertank ist unterhalb der Kabine platziert. Das sorgt für einen niedrigen Schwerpunkt. Er lässt sich beidseitig und mit bis zu 200 l/min in vier Minuten komplett befüllen. ...
Upon the implementation of the QCO, companies must apply for a license to utilize the BIS Standard Mark for manufacturing, importing, distributing, selling, storing, or displaying these chemicals for sale. Exportation is exempted from QCOs. This webinar will delineate the s...
结果1 题目 化工英文文献翻译The synthesis of H2tsalamo is shown in Scheme 1. Thereaction of the thiosalicylaldehyde5b,12,13 with 1,2-bis(aminooxy)ethane14 afforded the H2tsalamo in 47% yield as colorlesscrystals.15 H2tsalamo is remarkably stable both in the solidstate and in solution. ...
To achieve BIS certification, you must first choose a local representative to work with and then have tests conducted by an in-country, recognized laboratory. Registration is achieved by successfully demonstrating compliance to the MEITY requirements, using a testing laboratory recognized b...
Englisch, Japanisch, Koreanisch, Tradit. Chinesisch, Vereinf. Chinesisch Alter 4+ Copyright © 2018 Akikibai-Laboratory Preis 0,99 € App-Support Datenschutzrichtlinie Support Familienfreigabe Bis zu sechs Familienmitglieder können diese App bei aktivierter Familienfreigabe nutzen....
H04L12/28;(IPC1-7):H04J3/02;H04J3/24 分类: 电通信技术 公开(公告)号: US5349582(A) 公开(公告)日: 1994-09-20 发明名称: Scheme for source assisted partial destination release of slots in slotted networks 发明人: BISDIKIAN, CHATSCHIK;TANTAWY, AHMED N. 申请人: 申请日期: 1992-11-...
bisrdhazrd Orlando106 contributions 5 not worth the $$$ Dec 2018 • family my family of seven called to make a reservation. the only time they could seat us was at 8p and they insisted we placed our order when we made the reservation. this was a pain. their hours suck and basicall...
bIsDtDreamApp :null, bIsAlipayMini :null, weChartApply :null, }; }, created(){ let sUserAgent = window.navigator.userAgent.toLowerCase(); this.bIsDtDreamApp = sUserAgent.indexOf("dtdreamweb") > -1; // 浙里办APP this.bIsAlipayMini = sUserAgent.indexOf('miniprogram') > -1 && sUse...