Synthesis of tetrahydrofurans from protected β-hydroxyaldehydes: Optimization of the alcohol protecting group
作者:Steven R. Angle、Daniel S. Bernier、Nahla A. El-Said、Darin E. Jones、Stephanie Z. Shaw
DOI:10.1016/s0040-4039(98)00720-5
日期:1998.6
As part of an effort to generalize the synthesis of substituted tetrahydrofurans from protected β-hydroxy aldehydes, a series of common alcoholprotectinggroups was screened for compatibility with the methodology. Employing a β-(triisopropylsilyloxy)aldehyde resulted in a low yield of tetrahydrofuran, while the other protectinggroups all afforded good yields of tetrahydrofurans.
The present invention relates to the use of novel pyrrolopyrazine derivatives of Formula I,
wherein the variables Q1, R, and X are defined as described herein, which inhibit JAK and SYK and are useful for the treatment of auto-immune and inflammatory diseases.