denitrogenative and desulfinative addition of arylsulfonyl hydrazides with nitriles has been successfully achieved under mild conditions. This transformation is a new method for the addition reaction to nitriles with arylsulfonyl hydrazides as arylating agent, thus providing an alternative synthesis of aryl ketones. The reported addition reaction is tolerant to many common functional groups, and works
A metal-free approach for the synthesis of thiosulfonates from sulfonyl hydrazides
作者:Xue Li、WeiBo Liao、Bin Huang、YuanYuan Zhang、JiangWei Wang
DOI:10.1177/17475198211014444
日期:2021.11
Without any metal catalyst, an efficient transformation of a variety of sulfonyl hydrazides into the corresponding thiosulfonates mediated by NBS/DABCO under air is developed. The method utilizes mild reaction conditions, affords moderate to good yields of product, and tolerates a broad substrate scope. A plausible mechanism is proposed for the decomposition of the sulfonyl hydrazides and the construction
METHOD OF PURIFYING PINE CHEMICAL COMPOSITIONS FROM ALDEHYDES
申请人:Kraton Polymers LLC
公开号:EP3670490A1
公开(公告)日:2020-06-24
A method to reduce the aldehyde content of a pine chemical composition is disclosed. The pine chemical composition is selected from gum turpentine, gum rosin, CST BLS, CTO, depitched CTO, DTO, TOH, TOR, TOP, TOFA, fractionated TOFA, TOFA dimer, TOFA trimer, TOFA monomer, isostearic acid, stearic acid, and ester- and amide derivatives thereof. The pine chemical composition is treated with an aldehyde scavenger such as anthranilamide at a temperature between 20 °C to 300 °C, for 1 minute to 5 hours.
本发明公开了一种降低松木化学成分中醛含量的方法。松木化学组合物选自松节油树胶、松香树胶、CST BLS、CTO、脱氧 CTO、DTO、TOH、TOR、TOP、TOFA、分馏 TOFA、TOFA 二聚体、TOFA 三聚体、TOFA 单体、异硬脂酸、硬脂酸及其酯和酰胺衍生物。在 20 °C 至 300 °C 的温度下,用一种醛清除剂(如蒽尼胺)处理松木化学组合物 1 分钟至 5 小时。