The resolution of tertiary α-acetylene- acetate esters by the lipase from candida cylindracea
摘要:
The resolution of tertiary alcohols using the Candida cylindracea lipase is explored. In particular strategies are deployed to limit nonenzymatic hydrolysis of the tertiary acetate substrates in buffer, such that a full range of the steric requirements and limitations for successful resolutions can be explored.
(Diacetoxyiodo)benzene-Mediated Reaction of Ethynylcarbinols: Entry to α,α′-Diacetoxy Ketones and Glycerol Derivatives
作者:Qing-Rong Liu、Cheng-Xue Pan、Xiao-Pan Ma、Dong-Liang Mo、Gui-Fa Su
DOI:10.1021/acs.joc.5b00740
日期:2015.6.19
Efficient access to α,α′-diacetoxy ketones has been developed from ethynylcarbinols and PhI(OAc)2. A plausible mechanism for this was proposed on the basis of experimental studies. The usefulness of α,α′-diacetoxy ketone products has been documented, and glycerol derivatives can be easily synthesized in good yields via a one-potreaction.
photoactivation of the electrondonor–acceptor (EDA) complex. The reaction avoids the requirement for photocatalysts, bases, hydrogen donor reagents, any other additives, and harsh conditions, enabling the facile synthesis of various functionalized γ-hydroxy (E)-alkenylsulfonyl fluorides. These multifunctional sulfonyl fluorides can be further diversified, providing access to various privileged molecules
基于电子供体-受体 (EDA) 复合物的光活化,提出了使用 FSO 2 Cl 进行炔丙醇的自由基氢氟磺酰化。该反应不需要光催化剂、碱、供氢试剂、任何其他添加剂和苛刻的条件,从而能够轻松合成各种官能化的γ-羟基( E )-烯基磺酰氟。这些多功能磺酰氟可以进一步多样化,提供各种具有生物相关性的特殊分子。
Regiodivergent Synthesis of Functionalized Indene Derivatives via Pt-Catalyzed Rautenstrauch Reaction of Propargyl Carbonates
作者:Jinbo Zhao、Daniel A. Clark
DOI:10.1021/ol300158d
日期:2012.4.6
A regiodivergent synthesis of functionalized indene derivatives from a Pt-catalyzed Rautenstrauch reaction of propargyl carbonate is described. A one-pot Rautenstrauch/Tsuji-Trost reaction delivering 2-indanones was realized efficiently using this methodology.