Selective Homologation of Ketones and Aldehydes with Diazoalkanes Promoted by Organoaluminum Reagents
作者:Keiji Maruoka、Amel B. Concepcion、Hisashi Yamamoto
DOI:10.1055/s-1994-25682
日期:——
Organoaluminum-promoted single homologation or ring expansion of ketones and aldehydes with diazoalkanes has been described, and among various organoaluminum reagents, exceptionally bulky methylaluminum bis(2,6-di-tert-butyl-4-methylphenoxide) (MAD) is found to be highly effective for the selective homologation of various ketones and aldehydes.
FORMULATION AND DELIVERY OF MODIFIED NUCLEOSIDE, NUCLEOTIDE, AND NUCLEIC ACID COMPOSITIONS
申请人:MODERNA THERAPEUTICS, INC.
公开号:US20160038612A1
公开(公告)日:2016-02-11
The present disclosure provides, inter alia, formulation compositions comprising modified nucleic acid molecules which may encode a protein, a protein precursor, or a partially or fully processed form of the protein or a protein precursor. The formulation composition may further include a modified nucleic acid molecule and a delivery agent. The present invention further provides nucleic acids useful for encoding polypeptides capable of modulating a cell's function and/or activity.
MODIFIED NUCLEOSIDE, NUCLEOTIDE, AND NUCLEIC ACID COMPOSITIONS
申请人:MODERNA THERAPEUTICS
公开号:US20130156849A1
公开(公告)日:2013-06-20
The present disclosure provides, inter alia, formulation compositions comprising modified nucleic acid molecules which may encode a protein, a protein precursor, or a partially or fully processed form of the protein or a protein precursor. The formulation composition may further include a modified nucleic acid molecule and a delivery agent. The present invention further provides nucleic acids useful for encoding polypeptides capable of modulating a cell's function and/or activity.
The application pertains to derivatives of isosorbide according to general formula (I) wherein R' and R' ' independently from each other represent a represent a hydrogen atom or a polymeric moiety like (CH2-CHR1-O)x-H. This polymeric moiety is composed of epoxide- based monomers, described as H2COCH-R1, where R1 represents either a hydrogen atom, in the case of ethylene oxide, or an alkyl or alkenyl moiety with 1 to 33 C-atoms, which is saturated or unsaturated, branched or linear. This polymer moiety can be a homopolymer or a copolymer, x being the total degree of polymerization (DP). In the case of a block copolymer composed of monomer A (DP = a), preferably ethylene oxide or propylene oxide and monomer B (DP = b), preferably an alkyl or alkenyl moiety with 1 to 33 C-atoms, which is saturated or unsaturated, branched or linear, x = a + b. x is zero, or a number from 1 to 50, with the proviso that R' and R" are not both hydrogen atoms.
该申请涉及异山梨醇衍生物,其通式为(I),其中R'和R''独立地代表氢原子或聚合物基团,如(CH2-CHR1-O)x-H。该聚合物基团由环氧基单体组成,描述为H2COCH-R1,其中R1表示氢原子(在乙烯氧化物的情况下)或具有1至33个碳原子的饱和或不饱和、分支或直链的烷基或烯基基团。该聚合物基团可以是同聚物或共聚物,x为聚合度(DP)总和。在由单体A(DP = a,优选乙烯氧化物或丙烯氧化物)和单体B(DP = b,优选具有1至33个碳原子的饱和或不饱和、分支或直链的烷基或烯基基团)组成的块状共聚物的情况下,x = a + b。x为0或1至50之间的数字,但R'和R''不能同时为氢原子。
Modified ethylene-vinyl alcohol copolymer and method for the production thereof
申请人:——
公开号:US20040096683A1
公开(公告)日:2004-05-20
Provided is a modified ethylene-vinyl alcohol copolymer (C) having an ethylen content of 5 to 55 mol %, which contains a specific structural unit (I) in an amount of 0.3 to 40 mol % and may be obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) having a molecular weight of not more than 500. This can be produced by a method for producing the modified ethylene-vinyl alcohol copolymer (C) which comprises melting and kneading an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) in an extruder. The modified ethylene-vinyl alcohol copolymer (C) is superior to a unmodified ethylene-vinyl alcohol copolymer (A) in transparency, stretchability, flexibility and flexing resistance due to the specific structural unit (I) incorporated therein, and thus, can be used as a barrier material in various applications requiring the above performance capabilities.