Asymmetric ligand transformation reactions
Asymmetric ligand transformation reactions
... Resolution 1.2.3 Asymmetric Synthesis 1.3 Transition Metal Complexes in Asymmetric Synthesis 1.4 Transition Metal Complexes with Phosphine Based Ligands in Asymmetric Catalysis 1.4.1 Asymmetric hydrogenation ... for asymmetric Heck reaction involving phenylation of 2,3-dihydrofuran substrate.51 1.4.4 Other Reactions Involving Transition Metal Complexes with Phosphine Based Ligands...
Ngày tải lên: 11/09/2015, 14:32
Direct asymmetric vinylogous reactions of furanones and phthalide derivatives with bifunctional and trifunctional organocatalysts
... Direct Asymmetric Vinylogous Reactions of Furanones and Phthalide Derivatives with Bifunctional and Trifunctional Organocatalysts Luo Jie (BSc, Zhejiang ... development of direct enantioselective vinylogous reaction of furanones and phthalide derivatives with bifunctional and trifunctional organocatalysis Chapter presents a brief historical...
Ngày tải lên: 10/09/2015, 08:24
Alpha fluorinated aromatic ketone as nucleophile in asymmetric organocatalytic c n and c c bonds formation reactions 2
... deprotonation/deuteriation process 2. 2 Enantioselective H/D exchange of -fluorinated aromatic ketones 2. 2.1 Synthesis of -fluorinated aromatic cyclic ketones and chiral bicyclic guanidine catalyst ... much (entries 12- 13) Table 2. 1 Optimization of the asymmetric H/D exchange reaction of -fluorinated ketone 82a in different conditions (Scheme 2. 6) incorporation en...
Ngày tải lên: 10/09/2015, 15:51
Alpha fluorinated aromatic ketone as nucleophile in asymmetric organocatalytic c n and c c bonds formation reactions 4
... 3.7 Asymmetric amination reation of -fluorinated aromatic cyclic ketone Scheme 3.8 Other -fluorinated compounds tested in asymmetric amination a Conversion of corresponding products determined ... cyclic ketone nucleophiles in asymmetric amination reaction catalyzed by chiral bicyclic guanidine Under the optimal reaction conditions, the chiral -hydrozino- -fluorinated...
Ngày tải lên: 10/09/2015, 15:51
Alpha fluorinated aromatic ketone as nucleophile in asymmetric organocatalytic c n and c c bonds formation reactions 4a
... -fluorinated aromatic ketones in the asymmetric Mannich and Michael reactions 4.2 Asymmetric Mannich reaction of -fluorinated aromatic ketones 4.2.1 Synthesis of imines and pentanidines; Pentanidines ... Enatioselective C- C bond formation 4.1 Introduction Asymmetric C- C bond formation reactions are important reactions in organic synthesis Among the variou...
Ngày tải lên: 10/09/2015, 15:51
Alpha fluorinated aromatic ketone as nucleophile in asymmetric organocatalytic c n and c c bonds formation reactions 5
... 121 Experimental Colorless oil LRMS (ESI) m/z 55 1.3 (M+Na+); 5. 5 Protocol for bicyclic guanidine catalyzed asymmetric C- C bond formation reactions and characterization of products Procedures for ... 254 nm; retention time: major isomer: 124.3 min; minor isomer: 132.8 5. 4 Protocol for bicyclic guanidine catalyzed asymmetric C- N bond formation reaction and characteriza...
Ngày tải lên: 10/09/2015, 15:51
Alpha fluorinated aromatic ketone as nucleophile in asymmetric organocatalytic c n and c c bonds formation reactions
... asymmetric conjugated addition reactions Most aliphatic ketone and acetophenone nucleophiles used in organocatalytic asymmetric transformations rely on the formation of highly reactive enamine intermediates.1 ... basic phase-transfer conditions We will describe the asymmetric H/D exchange reaction, C- N and C- C bonds formation reactions catalyzed by our guanidin...
Ngày tải lên: 10/09/2015, 15:51
Development of direct asymmetric aldol reactions mediated by primary amino acid derived organocatalysts exploring DNA cleaving activities of varacin b and varacin c
... PART Ⅰ: DEVELOPMENT < /b> OF < /b> DIRECT < /b> ASYMMETRIC < /b> ALDOL < /b> REACTIONS < /b> MEDIATED < /b> BY < /b> PRIMARY < /b> AMINO < /b> ACID-< /b> DERIVED < /b> ORGANOCATALYSTS < /b> PART Ⅱ: EXPLORING < /b> DNA-< /b> CLEAVING < /b> ACTIVITIES < /b> OF < /b> VARACIN < /b> B AND VARACIN < /b> C JIANG ZHAOQIN ... 2-hydroxy-γ-butyrolactones 150 Scheme 5-1 Structur...
Ngày tải lên: 14/09/2015, 08:39
The syntheses of bis guanidium salts and their applications in asymmetric mukaiyama type SN2 alkylation reactions
... The Syntheses of Various Bis- Guanidium Salts Chapter The Syntheses of Various Bis- Guanidium Salts Chapt r 1: The Syntheses of Various Bis- Guanidium Salts 11 Chapter The Syntheses of Various Bis- Guanidium ... Pentanidium Salts to Bis- Guanidium Salts 1.2 Syntheses of Various Bis- Guanidium Salts Since the basic fragments of bis...
Ngày tải lên: 30/09/2015, 10:12
Precipitations In Chemical Reactions
... làm cho trình k t tinh hình thành k t t a có th x y Tr c tiên s k t t a b t u t o thành vi tinh th óng vai trò nh h t gi ng làm m m cho s k t tinh b m t c a vi tinh th Sau ó tinh th l n d n n ... + KOH nh k t t a s b n t th c hành Co(C2H3O2)2 + LiOH t t a ph n ng hóa h c Trang Precipitations In Chemical Reactions oán s k t t a d a vào n ng c a ion Trong bi u th c c a Ksp v ph i tích n...
Ngày tải lên: 22/08/2012, 09:18
Nghiên cứu điều chế một số ligand họ pyridinium làm tiền chất để tổng hợp MOFs
... u lig nd ƣợc tổng hợp t nhƣng Việt N m th ch khởi ầu nên số lƣợng lig nd tổng hợp ƣợc c n hạn ch lig nd thuộc họ Pyridinium Do việc tổng hợp r c c lig nd n i chung lig nd thuộc họ Pyridinium n ... ƣợc nghiên cứu trƣớc 1.2 đồ tổng hợp 1,3-azulenedicarboxylic acid 1.3 đồ tổng hợp N, N’, N’’-trimethyl-N, N’, N’'-tris(3-pyridyl)- 1,3,5-benzenetricarboxamide Một...
Ngày tải lên: 23/04/2013, 21:05
sentences transformation
... bag is the same ………….the blue one a as b to c from d with II/ Write (2,0ms) Change the following sentences in to indirect speech Miss Jackson said: “ You should improve your English pronunciation, ... (2)………… and try to learn them by heart However, others not Instead, they write one or two example sentences with each new word (3)……………… order to remember how (4)……………………the word in the righ...
Ngày tải lên: 11/06/2013, 01:27