✅ پاسخ سوال 122 – گزینه 1
واکنش از نوع نوآرایی فریس Fries Rearrangement می‌باشد که که گروه آسیل در موقعیت ارتو (گزینه 1) و پارا (در بین گزینه ها نیست) قرار می‌گیرد. معمولا ارتو در دماهای پایین و پارا در دماهای بالاتر ایجاد می‌شود.
در ابتدا ترکیب گزینه 4 ایجاد می‌شود و سپس به ترکیب گزینه 1 نوآرایی می‌کند.
@OrganicChemistry2017
BY ⌬ شیمی آلی ⌬
The messaging service and social-media platform owes creditors roughly $700 million by the end of April, according to people briefed on the company’s plans and loan documents viewed by The Wall Street Journal. At the same time, Telegram Group Inc. must cover rising equipment and bandwidth expenses because of its rapid growth, despite going years without attempting to generate revenue.
The SSE was the first modern stock exchange to open in China, with trading commencing in 1990. It has now grown to become the largest stock exchange in Asia and the third-largest in the world by market capitalization, which stood at RMB 50.6 trillion (US$7.8 trillion) as of September 2021. Stocks (both A-shares and B-shares), bonds, funds, and derivatives are traded on the exchange. The SEE has two trading boards, the Main Board and the Science and Technology Innovation Board, the latter more commonly known as the STAR Market. The Main Board mainly hosts large, well-established Chinese companies and lists both A-shares and B-shares.
⌬ شیمی آلی ⌬ from hk