A method for forming a monomeric carbonate includes the step of combining a monofunctional alcohol or a difunctional diol with an ester-substituted diaryl carbonate to form a reaction mixture. Similarly, a method for forming a monomeric ester includes the step of combining a monofunctional carboxylic acid or ester with an ester-substituted diaryl carbonate to form a reaction mixture. These methods further include the step of allowing the reaction mixtures to react to form a monomeric carbonate or a monomeric ester, respectively.
Forest Biotechnology '99—A Joint Meeting of the International Wood Biotechnology Symposium and the Iufro Working Party for Molecular Genetics of Trees, 11–16 July, 1999 Oxford, UK
作者:D. Ellis、T. Strabala
DOI:10.1007/s11627-000-0027-1
日期:2000.3
Genetically Engineered Free Forests (GEFF), a group assembled specifically in response to the meeting. In addition, on the opening night of the meeting the only field trial of transgenic trees in the UK, testing trees engineered to suppress lignin production (CAD antisense), was destroyed. The meeting opened with a keynote address by Ron Sederoff (North Carolina University, USA) in which he succinctly
The present invention provides a naphthyridine derivative represented by the formula (1)
wherein A is lower alkylene; R1 is H or an electron pair "-"; R2 is optionally substituted phenyl;
when R1 is an electron pair "-", R3 is a group represented by
(wherein R4 and R5 each represent lower alkyl, etc.); when R1 is H, R3 is a group -S-R6 (wherein R6 is lower alkyl, etc.); and R7 is H or lower alkyl; and also provides an analgesic composition containing the above derivative as an active ingredient.
本发明提供了一种由式(1)表示的萘啶衍生物
其中 A 是低级亚烷基;R1 是 H 或电子对"-";R2 是任选取代的苯基;
当 R1 是电子对"-"时,R3 是由以下式表示的基团
(其中R4和R5各自代表低级烷基等);当R1是H时,R3是一个基团-S-R6(其中R6是低级烷基等);R7是H或低级烷基;还提供了一种含有上述衍生物作为活性成分的镇痛组合物。
Studies on 4-Hydroxycoumarins. I. The Synthesis of 4-Hydroxycoumarins<sup>1</sup>
作者:Mark Arnold Stahmann、Ivan Wolff、Karl Paul Link
DOI:10.1021/ja01252a007
日期:1943.12
POLY(CARBONATE-CO-UREA) COPOLYMERS AND MELT TRANSESTERIFICATION METHOD OF PREPARING THESE COPOLYMERS
申请人:Kamps Jan Henk
公开号:US20080275206A1
公开(公告)日:2008-11-06
Disclosed herein is a poly(carbonate-co-urea-co-ester) copolymer comprising incorporated urea compound, dihydroxy compound and diacid compound residues. Also disclosed herein is a poly(carbonate-co-urea) copolymer comprising incorporated urea compound and dihydroxy compound residues.