Organocatalytic Synthesis of (2S,3R)-3-Hydroxy-3-methyl-proline (OHMePro), a Component of Polyoxypeptins, and Relatives Using OHMePro Itself as a Catalyst
摘要:
An efficient synthesis of (2S,3R)-3-hydroxy-3-methylproline (OHMePro), a component of polyoxypeptins, and relatives was achieved, in which an intramolecular asymmetric aldol reaction of the ketoaldehyde using OHMePro itself as an organocatalyst constitutes a key step.
Organocatalytic Synthesis of (2S,3R)-3-Hydroxy-3-methyl-proline (OHMePro), a Component of Polyoxypeptins, and Relatives Using OHMePro Itself as a Catalyst
摘要:
An efficient synthesis of (2S,3R)-3-hydroxy-3-methylproline (OHMePro), a component of polyoxypeptins, and relatives was achieved, in which an intramolecular asymmetric aldol reaction of the ketoaldehyde using OHMePro itself as an organocatalyst constitutes a key step.
Gold(<scp>iii</scp>)-catalyzed chemoselective annulations of anthranils with <i>N</i>-allylynamides for the synthesis of 3-azabicyclo[3.1.0]hexan-2-imines
作者:Lina Song、Xianhai Tian、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1039/c9cc04027g
日期:——
We herein report the gold(iii)-catalyzed selective annulation of anthranils with N-allylynamides under mild conditions.
我们在此报告了在温和条件下金(III)催化的选择性闭环反应,即苯并噻唑与N-烯丙基亚胺的环化。
Photopolymerisierbares Gemisch und lichtempfindliches Schichtübertragungsmaterial
申请人:HOECHST AKTIENGESELLSCHAFT
公开号:EP0006125A1
公开(公告)日:1980-01-09
Es werden Weichmacher für photopolymerisierbare Gemische aus alkalilöslichen Bindemittein, Monomeren und Photoinitiatpren beschrieben, die der Formel
entsprechen, worin
R, ein Wasserstoff- oder Halogenatom oder ein Alkylrest mit 1 bis 4 Kohlenstoffatomen,
R2 ein Wasserstoffatom, eine OH-Gruppe oder ein Alkylrest mit 1-4 Kohlenstoffatomen,
R3 ein Wasserstoffatom oder eine Methylgruppe,
R4 einen Alkyl- oder Alkenylrest mit 1 bis 20 C-Atomen und
n Null oder eine Zahl von 1 bis 20 bedeutet,
wobei R4 mindestens 4 C-Atome hat, wenn n Null oder 1 ist.
Die Gemische ergeben lichtempfindliche Schichten, besonders für Trockenresistmaterialien, mit guter Flexibilität und geringem Kaltfluß.
Die durch Beschichtung mit den Schmelzkleberpasten des Standes der Technik erhaltenen textilen Fixiereinlagen zeigen bei der Verklebung mit den Oberstoffen nicht immer eine ausreichende Rückschlagfestigkeit. Dieser Mangel wird durch die Schmelzkleberpasten der Erfindung, welche ein Silikontensid aus der Gruppe der organomodifizierten Polymethylsiloxane enthalten, behoben.
EPOXY RESIN COMPOSITION FOR FIBER-REINFORCED COMPOSITE MATERIAL, PREPREG, AND FIBER-REINFORCED COMPOSITE MATERIAL
申请人:TORAY INDUSTRIES, INC.
公开号:EP0947562A1
公开(公告)日:1999-10-06
In order to realise the objectives stated above, the thermosetting resin composition for carbon fibre reinforced composite materials of the present invention chiefly comprises the following components.
(A) Thermosetting resin
(B) Compound containing one functional group which can react with thermosetting resin (A) or its curing agent, and a moiety selected from the following formulae (1) to (4)
Furthermore, the present invention also relates to a prepreg formed by impregnating reinforcing fibre with the aforesaid resin composition and to carbon fibre reinforced composite materials comprising reinforcing fibre and a cured aforesaid thermosetting resin composition.
In accordance with the present invention, there can be obtained a thermosetting resin composition where the adhesion to reinforcing fibre by the cured material and the elastic modulus of the cured material are excellent, and by using this resin composition there can be obtained carbon fibre reinforced composite materials which are excellent in their 0° compressive strength, 90° tensile strength and interlaminar shear strength, and which also have outstanding impact resistance.
EPOXY RESIN COMPOSITION FOR FIBER-REINFORCED COMPOSITE MATERIAL, PREPREG, AND FIBER-REINFORCED COMPOSITE MATERIAL
申请人:——
公开号:US20020007022A1
公开(公告)日:2002-01-17
In order to realize the objectives stated above, the thermosetting resin composition for carbon fiber reinforced composite materials of the present invention chiefly comprises the following components.
(A) Thermosetting resin
(B) Compound containing one functional group which can react with thermosetting resin (A) or its curing agent, and a moiety selected from the following formulae (1) to (4)
1
Furthermore, the present invention also relates to a prepreg formed by impregnating reinforcing fiber with the aforesaid resin composition and to carbon fiber reinforced composite materials comprising reinforcing fiber and a cured aforesaid thermosetting resin composition.
In accordance with the present invention, there can be obtained a thermosetting resin composition where the adhesion to reinforcing fiber by the cured material and the elastic modulus of the cured material are excellent, and by using this resin composition there can be obtained carbon fiber reinforced composite materials which are excellent in their 0° compressive strength, 90° tensile strength and interlaminar shear strength, and which also have outstanding impact resistance.