ChemInform Abstract: The π-Arene Chromium Complex as a Facial Selectivity Control Element: The Enantioselective Synthesis of Cetirizine Hydrochloride

ChemInform ◽  
2010 ◽  
Vol 28 (25) ◽  
pp. no-no
Author(s):  
K. SCHILDKNEGT ◽  
J. AUBE
Keyword(s):  
Enantioselective Synthesis ◽  
Control Element ◽  
Chromium Complex ◽  
Facial Selectivity ◽  
Cetirizine Hydrochloride ◽  
Selectivity Control

Enantioselective Synthesis of Epi-Emetine Analogues: Control of the Facial Selectivity in a Three-Component Domino Knoevenagel-Hetero-Diels-Alder Reaction*

2004 ◽  
Vol 59 (4) ◽  
pp. 468-477 ◽  
Author(s):  
Lutz F. Tietze ◽  
Nils Rackelmann
Keyword(s):  
Main Product ◽  
Enantioselective Hydrogenation ◽  
Alder Reaction ◽  
Diels Alder ◽  
Enantioselective Synthesis ◽  
Enol Ether ◽  
Meldrum’S Acid ◽  
Chiral Catalyst ◽  
Diels Alder Reaction ◽  
Facial Selectivity

AbstractThe domino Knoevenagel-hetero-Diels-Alder reaction of the aldehyde rac-8, Meldrum’s acid 2 and enol ether 3 leads to the cycloadduct rac-17 as the main product which in a second domino process was transformed into the benzoisoquinolizidine rac-18 by solvolysis, hydrogenolysis, condensation and hydrogenation; rac-18 was used as a substrate for the synthesis of the two diastereomeric epiemetine analogues 9 and 10 with > 96% ee (9) and 80% ee (10), respectively, by condensation with the phenylethylamine 23, Bischler-Napieralski reaction and “enantioselective” hydrogenation using the chiral catalyst (R,R)-26.

Enantioselective Synthesis of Novel Enantiopure Phosphines via Reaction of a Tricarbonyl(η6-arene)chromium Complex with a Chiral Lithium Amide Base

Synlett ◽  
2000 ◽  
Vol 12 (12) ◽  
pp. 1453-1455 ◽  
Author(s):  
Azhar Ariffin ◽  
Alexander Blake ◽  
Wan-Sheung Li ◽  
Nigel Simpkins
Keyword(s):  
Enantioselective Synthesis ◽  
Lithium Amide ◽  
Chromium Complex

Catalytic enantioselective synthesis of indolizino[8,7-b]indole alkaloid derivatives based on the tandem reaction of tertiary enamides

2021 ◽  
Author(s):  
Xin-Ming Xu ◽  
Ming Xie ◽  
Jiazhu Li ◽  
Mei-Xiang Wang
Keyword(s):  
Indole Alkaloid ◽  
Enantioselective Synthesis ◽  
High Yield ◽  
Tandem Reaction ◽  
Indole Derivatives

An exquisite Pybox/Cu(OTf)2-catalyzed asymmetric tandem reaction of tertiary enamides was developed, which enabled the expeditious synthesis of indolizino[8,7-b]indole derivatives in high yield, excellent enantioselectivity and diastereoselectivity.

Housing Inflation: Policy Guidelines from Shariah Perspective

2019 ◽  
Vol 16 (1) ◽  
pp. 70-81
Author(s):  
Azrul Azlan Iskandar Mirza ◽  
Asmaddy Haris ◽  
Ainulashikin Marzuki ◽  
Ummi Salwa Ahmad Bustamam ◽  
Hamdi Hakiem Mudasir ◽  
...  
Keyword(s):  
Content Analysis ◽  
Housing Prices ◽  
Construction Materials ◽  
Housing Price ◽  
Developed Countries ◽  
Control Element ◽  
Recent Issue ◽  
Analysis Methodology ◽  
The Government ◽  
Developing And Developed Countries

The soaring housing prices in Malaysia is not a recent issue. It is a global phenomenon especially in developing and developed countries, driven by factors including land price, location, construction materials cost, demand, and speculation. This issue demands immediate attention as it affects the younger generation, most of whom could not afford to buy their own house. The government has taken many initiatives and introduced regulations to ensure that housing prices are within the affordable range. This article aims to introduce a housing price control element from the Shariah perspective, as an alternative solution for all parties involved in this issue. It adopts content analysis methodology on policy from Shariah approved sources.

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