US 2017/0362174 A1 · A NOVEL PROCESS FOR THE PREPARATION OF CONSIDERABLY PURE SILODOSIN

Abstract

The present invention relates to a connector tongue element (1) for an electrical connector plug receptacle (4), the connector tongue element comprising: a flexible printed circuit (10) having an attachment portion (11); connector pins (12) attached and electrically connected to the flexible printed circuit at the attachment portion; and a first body (13) of polymeric material molded around at least a part of the attachment portion to form a connector base portion (14), the first body mechanically secures the attachment of the connector pins to the flexible printed circuit, wherein the connector pins extend from the connector base portion in a withdrawal direction along which an electrical connector plug is adapted to be withdrawn from the electrical connector plug receptacle; wherein the connector pins form a connector tongue portion (16) extending from the connector base portion in the withdrawal direction; and wherein the first body allow the connector pins to present connecting surfaces for connecting the electrical connector plug receptacle to the electrical connector plug.

Claims13

Dependent claims

A process for the preparation of Silodosin represented by Formula 1;

wherein the process comprises the steps of:
a) condensing chiral compound represented by Formula (III)
wherein, Bz represents to Benzoyl group with compound represented by Formula (IV)
wherein, Ms represents to Methanesulfonyl group in presence of a base and a phase transfer catalyst:
in an organicsolvent to give intermediate represented by Formula (V)
wherein, n is an integer of 1 and 2;
b) optionally isolating compound of Formula (V);
c) without purification converting compound of Formula (V) to de-protected compound represented by Formula (IX) in an organic solvent;
wherein, n is as defined above;
d) optionally isolating compound of Formula (IX);
e) without purification converting compound of Formula (IX) to a compound represented by Formula (X)
wherein n is as defined above;
f) subjecting compound of Formula (X) to purification by converting to an acid salt for removal of N,N-dialkyl impurity represented by Formula (IIc);
g) hydrolysis of the acid salt formed in step f) to obtain Silodosin of Formula (I).

11 more elements

Dependencies are inferred from the claim text.

A novel process for the preparation of considerably pure silodosin

Life of this patent

A novel process for the preparation of considerably pure silodosin

Life of this patent

Abstract

Claims13