Ketenes are useful synthetic building blocks due to their propensity to

undergocycloaddition reactions with several different partners

including alkenes2, aldehydes or ketones3, and imines4 to form a

cyclobutanones, β-lactones, and β-lactams.

Alkenones are very important organic synthesis intermediates due to their ease of undergoing [2 + 2] cycloaddition reactions. They can react with alkenes, aldehydes, and imines to yield cyclobutanones, β-lactones, and β-lactams. Nucleophiles readily add to the carbon of O=C=C, making these reactions very common. Recently, chiral nucleophilic catalysts or chiral auxiliaries

Shenzhen hardware manufacturer FEVM recently launched a mini PC named FN60G. This product looks somewhat similar to the Apple Mac Studio but offers superior performance in a more compact size. The FN60G is equipped with an Intel Core i9-14900KF processor and an Nvidia GeForce RTX 4090 laptop GPU, making it one of the most powerful mini PCs on the market.

The dimensions of the

This is the last article of the Year of the Tiger. Continuing from the previous content, let's talk about how to improve the usability of hardware.

Introduction

If your requirements are very simple and clear, and you do not need a user interface, the Ubuntu Server mentioned in the previous content should already be able to meet your needs.

However, if you, like me, want to use a relatively simple and beautiful interface to manage configurations and view status, you might consider using