Highly Stereoselective Chemoenzymatic Synthesis of the 3H-Isobenzofuran Skeleton. Access to Enantiopure 3-Methylphthalides
摘要:
A straightforward synthesis of (S)-3-methylphthalides has been developed, with the key asymmetric step being the bioreduction of 2-acetylbenzonitriles. Enzymatic processes have been found to be highly dependent on the pH value, with acidic conditions being required to avoid undesired side reactions. Baker's yeast was found lobe the best biocatalyst acting in a highly stereoselective fashion. The simple treatment of the reaction crudes with aqueous HCl has provided access to enantiopure (S)-3-methylphthalides in moderate to excellent yields.
Highly Stereoselective Chemoenzymatic Synthesis of the 3H-Isobenzofuran Skeleton. Access to Enantiopure 3-Methylphthalides
摘要:
A straightforward synthesis of (S)-3-methylphthalides has been developed, with the key asymmetric step being the bioreduction of 2-acetylbenzonitriles. Enzymatic processes have been found to be highly dependent on the pH value, with acidic conditions being required to avoid undesired side reactions. Baker's yeast was found lobe the best biocatalyst acting in a highly stereoselective fashion. The simple treatment of the reaction crudes with aqueous HCl has provided access to enantiopure (S)-3-methylphthalides in moderate to excellent yields.
Synthesis of 2-Acetylbenzonitriles and Their Reactivity in Tandem Reactions with Carbon and Hetero Nucleophiles: Easy Access to 3,3-Disubstituted Isoindolinones
作者:Antonia Di Mola、Miriam Di Martino、Vito Capaccio、Giovanni Pierri、Laura Palombi、Consiglia Tedesco、Antonio Massa
DOI:10.1002/ejoc.201800240
日期:2018.4.17
In only two steps: From readily available 2‐ethylbenzonitriles to 3‐hydroxy‐3‐methylisoindolinones and other novel 3,3‐disubstituted derivatives.
A remedy for osteoporosis containing a diazepine compound represented by general formula (I) or a pharmaceutically acceptable salt thereof as the active ingredient; a method of treating osteoporosis by administering the above compound; and the use of the compound for preparing a remedy for osteoporosis in formula (I) Ar represents aryl or heteroaryl; X represents oxygen or sulfur; W represents -N(R³⁶)-, -O- or -S-; Q represents a ring selected among (a), (b), (c) and (d), X and Y may be combined together to form =N-N=C(R⁶)-, =N-C(R⁵)=C(R⁶)-, =C(R⁵)-N=C(R⁶)-, =N-O-CO- or =N-N(R⁵)-CO-.
一种治疗骨质疏松症的药物,含有通式(I)代表的二氮杂卓化合物或其药学上可接受的盐作为活性成分;一种通过施用上述化合物治疗骨质疏松症的方法;以及该化合物用于制备骨质疏松症药物的用途,在式(I)中 Ar 代表芳基或杂芳基;X代表氧或硫; W代表-N(R³⁶)-、-O-或-S-;Q 代表选自(a)、(b)、(c)和(d)的环,X 和 Y 可结合在一起形成 =N-N=C(R⁶)-、=N-C(R⁵)=C(R⁶)-、=C(R⁵)-N=C(R⁶)-、=N-O-CO- 或 =N-N(R⁵)-CO-。
US5593988A
申请人:——
公开号:US5593988A
公开(公告)日:1997-01-14
US5753649A
申请人:——
公开号:US5753649A
公开(公告)日:1998-05-19
Highly Stereoselective Chemoenzymatic Synthesis of the 3<i>H</i>-Isobenzofuran Skeleton. Access to Enantiopure 3-Methylphthalides
A straightforward synthesis of (S)-3-methylphthalides has been developed, with the key asymmetric step being the bioreduction of 2-acetylbenzonitriles. Enzymatic processes have been found to be highly dependent on the pH value, with acidic conditions being required to avoid undesired side reactions. Baker's yeast was found lobe the best biocatalyst acting in a highly stereoselective fashion. The simple treatment of the reaction crudes with aqueous HCl has provided access to enantiopure (S)-3-methylphthalides in moderate to excellent yields.