Molecular Iodine-Catalyzed Facile Procedure for N-Boc Protection of Amines
摘要:
An efficient and practical protocol for the protection of various structurally and electronically divergent aryl and aliphatic amines using (Boc)(2)O in the presence of a catalytic amount of molecular iodine (10 mol %) under solvent-free conditions at ambient temperature is presented.
NiH-Catalyzed Reductive Relay Hydroalkylation: A Strategy for the Remote C(sp<sup>3</sup>
)−H Alkylation of Alkenes
作者:Fang Zhou、Jin Zhu、Yao Zhang、Shaolin Zhu
DOI:10.1002/anie.201712731
日期:2018.4.3
The terminal‐selective, remoteC(sp3)−H alkylation of alkenes was achieved by a relay process combining NiH‐catalyzed hydrometalation, chain walking, and alkylation. This method enables the construction of unfunctionalized C(sp3)−C(sp3) bonds under mild conditions from two simple feedstock chemicals, namely olefins and alkyl halides. The practical value of this transformation is further demonstrated
Synthesis of 7-Aza- and 7-Thiasphingosines, and Evaluation of Their Interaction with Sphingosine Kinases and with T-Cells
作者:Thresen Mathew、Célia Billaud、Andreas Billich、Marco Cavallari、Peter Nussbaumer、Gennaro De Libero、Andrea Vasella
DOI:10.1002/cbdv.200900039
日期:2009.5
The synthesis of 7-oxasphingosine (3) and 7-oxaceramide (4) was improved by starting from the 4-methoxybenzyl-protected d-galactal 9. The sphingosine analogues 5-7 and 24 were synthesized via the azido alcohol 13. The 7-thiasphingosine 5 is a poorer substrate for both isoforms of sphingosinekinase (SPHK) than sphingosine, but showed a slight preference for SPHK2. The sulfone 6 and the 7-aza compounds
[EN] 1, 3, 4-SELENADIAZOLE COMPOUNDS WITH PHARMACOLOGICAL ACTIVITY<br/>[FR] COMPOSÉS DE 1,3,4-SÉLÉNADIAZOLE PRÉSENTANT UNE ACTIVITÉ PHARMACOLOGIQUE
申请人:HANGZHOU JENNIFER BIOTECH CO LTD
公开号:WO2017101793A1
公开(公告)日:2017-06-22
The invention belongs to the field of biomedical research involving the 1, 3, 4- selenyldiazo derivatives that have cell protective activity. Because there are not so many heterocyclic selenium compounds, we synthesized a new type of selenium analog of BPTES. As the isoacceptor of BPTES, the compounds have antitumor activity, anti-oxidation and cell protection function. Currently many drugs contain the thiodiazo motif, so synthesis of selenyldiazo functional group could further optimize these drugs and are important in new drug development and application.
Chemoselective conversion of azides to t-butyl carbamates and amines
作者:Yeon Joo Jung、Yu Mi Chang、Ji Hee Lee、Cheol Min Yoon
DOI:10.1016/s0040-4039(02)02106-8
日期:2002.11
Azides were converted to the corresponding carbamates using a system of 20 mol% of decaborane (B10H14) and 20 weight% of 10% Pd/C in methanol in the presence of di-tert-butyl dicarbonate at rt in high yields and to the corresponding amines using a system of 10 mol% of decaborane and 20 weight% of 10% Pd/C in methanol in the absence of di-tert-butyl dicarbonate at rt in high yields. (C) 2002 Elsevier Science Ltd. All rights reserved.
Molecular Iodine-Catalyzed Facile Procedure for <i>N</i>-Boc Protection of Amines
作者:Ravi Varala、Sreelatha Nuvula、Srinivas R. Adapa
DOI:10.1021/jo0612473
日期:2006.10.1
An efficient and practical protocol for the protection of various structurally and electronically divergent aryl and aliphatic amines using (Boc)(2)O in the presence of a catalytic amount of molecular iodine (10 mol %) under solvent-free conditions at ambient temperature is presented.