2results about How to "Overcome shortcomings" patented technology

The application belongs to the field of organic synthesis and particularly relates to a synthesis method of substituted silabicyclo[4.1.0]heptan-2-one derivatives. The method comprises the following steps: pyridine N-oxide mediates intramolecular radical tandem cyclization reaction of 1,6-silabenzyne compounds to obtain silabicyclo[4.1.0]heptan-2-one derivatives. The reaction condition of the application is mild and simple, only needs to add a catalytic amount of non-metal photocatalyst, does not need to add other metal catalysts and ligands; and the reaction does not need strict anhydrous and anaerobic conditions, is easy to operate, has a relatively short reaction time, the product is easy to separate and purify, and has a relatively high yield.

A connection (1) for a fluid, comprising: a hose (2) in which the fluid is intended to flow, the hose (2) comprising: an outer layer (21) of polymeric material, an inner layer (22) of polymeric material and at least one intermediate layer (23) between the outer and inner layers (21, 22), the intermediate layer being made of a net, a mesh fabric, a braid, a helically wound wire, a textile fibre, a fabric or a non-woven fabric; a connector (4) in which the fluid is intended to flow and which is in fluid communication with the hose (2); wherein the hose (2) is mounted around a male end portion (8) of the connector (4); a ring (6) made of polymeric material which is mounted around the hose (2) at the male end portion (8) of the connector (4); when the ring (6) is mounted around the hose (2) at the male end portion (8), the ring (6) is deformed and exerts a compressive force on the hose (2) as a result of this deformation.