A PHP Error was encountered

Severity: Warning

Message: fopen(/var/lib/php/sessions/ci_sessionps06c2tt72dpe96ttftaiinlgkq9s165): Failed to open stream: No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 177

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_start(): Failed to read session data: user (path: /var/lib/php/sessions)

Filename: Session/Session.php

Line Number: 137

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once

Directing group assisted -hydroxylation by C-H activation. | LitMetric

Directing group assisted -hydroxylation by C-H activation.

Chem Sci

Department of Chemistry , IIT Bombay , Powai , Mumbai-400076 , India . Email: ; Email:

Published: May 2016

-Hydroxylated cores are ubiquitous in natural products. Herein, we disclose the first template assisted hydroxylation reaction. Experimental and studies helped us to gain valuable mechanistic insights, including the role of the hexafluoroisopropanol (HFIP) solvent, during C-H hydroxylation. The reactive intermediates, prior to the C-H activation, have been detected by spectroscopic techniques. Additionally, the C-O bond formation has been extended to -acetoxylation. The preparation of a phase II quinone reductase activity inducer and a resveratrol precursor illustrated the synthetic significance of the present strategy.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6005269PMC
http://dx.doi.org/10.1039/c5sc04060dDOI Listing

Publication Analysis

Top Keywords

c-h activation
8
directing group
4
group assisted
4
assisted -hydroxylation
4
-hydroxylation c-h
4
activation -hydroxylated
4
-hydroxylated cores
4
cores ubiquitous
4
ubiquitous natural
4
natural products
4

Similar Publications

Background: Entrectinib, a central nervous system (CNS)-penetrant TRK/ROS1 inhibitor, has demonstrated clinical activity in children with NTRK1/2/3 or ROS1 fusion-positive extracranial solid and CNS tumours. We present integrated data of entrectinib in children with NTRK or ROS1 fusion-positive tumours from the STARTRK-NG, TAPISTRY, and STARTRK-2 trials.

Methods: Efficacy analyses were undertaken on TRK/ROS1 inhibitor-naïve patients aged <18 years with metastatic/locally advanced NTRK1/2/3 or ROS1 fusion-positive extracranial solid or CNS tumours who received ≥1 entrectinib dose and had ≥6 months of follow-up from enrolment.

View Article and Find Full Text PDF

An efficient Rh(III)-catalyzed annulation between 3-aryl-2-benzo[][1,4]oxazines and α-diazo-β-ketoesters was developed, affording a series of polycyclic heteroarenes in moderate to excellent yields with good functional group compatibility. The procedure featured high efficiency, redox neutrality, twofold -C-H activation, and dual [4 + 2] annulation. Moreover, several important intermediates and products have been isolated as powerful evidence for the proposed reaction mechanism.

View Article and Find Full Text PDF

Azidoalkyation is an efficient strategy for the conversion of unsaturated precursors into nitrogen-containing structural motifs. Herein, we describe a convenient and highly regioselective iron-catalyzed 1,2-azidoalkylation of 1,3-dienes that employs TMSN as a coupling partner with hydrocarbons that bear diverse C-H bonds. This chemistry is achieved through the direct functionalization of strong C(sp)-H bonds and is facilitated by a combination of hydrogen atom transfer (HAT) and iron catalysis.

View Article and Find Full Text PDF

Direct chemical conversion of plastic waste into low-carbon oxygenates, rather than carbon dioxide, with renewable energy, is important yet challenging. Due to the high C-X (X = C, H, N) bond energy, fully optimized catalysts are required to enable precise bond cleavage for boosted efficiency and selectivity. Here, we report adaptable and recyclable molybdenum peroxide photocatalysts that demonstrate chemical scissors for the selective conversion of polyamide to alcohol.

View Article and Find Full Text PDF

Background: Extracorporeal membrane oxygenation (ECMO) indications in patients with accidental hypothermia (AH) and hemodynamic instability before cardiac arrest (CA) are unclear. We aimed to identify a subgroup of these patients who would benefit from ECMO rewarming.

Methods: This study was a post-hoc analysis of the ICE-CRASH study (2019-2022), a prospective, multicenter, observational study throughout Japan.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!