Surfactants constructed from three synthetic building blocks that contain multiple hydrocarbon chains, ethyleneamine, and alkyl sulfonate salt groups, were shown to possess good thermal stability, and foamability, and high foam profiles. The materials are targeted for high temperature foaming applications, such as foam flooding enhanced oil recovery to improve conformance control and other oil and gas downhole foaming applications.

Surfactants constructed from three synthetic building blocks that contain multiple hydrocarbon chains, ethyleneamine, and alkyl sulfonate salt groups, were shown to possess good thermal stability, and foamability, and high foam profiles. The materials are targeted for high temperature foaming applications, such as foam flooding enhanced oil recovery to improve conformance control and other oil and gas downhole foaming applications.

A radiation-sensitive resin composition includes a first polymer including a first structural unit that includes a first acid-labile group; a radiation-sensitive acid generator; and a compound represented by formula (1). n is 1 or 2. R.sup.1 represents a hydrogen atom or a monovalent organic group having 1 to 20 carbon atoms in a case in which n is 1. R.sup.1 represents a divalent organic group having 1 to 20 carbon atoms in a case in which n is 2. R.sup.2 represents a hydrogen atom or a monovalent organic group having 1 to 20 carbon atoms. E represents a group represented by formula (i). R.sup.2 and E may taken together represent a ring structure having 3 to 20 ring atoms together with the nitrogen atom. X represents a divalent organic group having 1 to 20 carbon atoms. R.sup.3 represents a second acid-labile group.

##STR00001##

A radiation-sensitive resin composition includes a first polymer including a first structural unit that includes a first acid-labile group; a radiation-sensitive acid generator; and a compound represented by formula (1). n is 1 or 2. R.sup.1 represents a hydrogen atom or a monovalent organic group having 1 to 20 carbon atoms in a case in which n is 1. R.sup.1 represents a divalent organic group having 1 to 20 carbon atoms in a case in which n is 2. R.sup.2 represents a hydrogen atom or a monovalent organic group having 1 to 20 carbon atoms. E represents a group represented by formula (i). R.sup.2 and E may taken together represent a ring structure having 3 to 20 ring atoms together with the nitrogen atom. X represents a divalent organic group having 1 to 20 carbon atoms. R.sup.3 represents a second acid-labile group.

##STR00001##

The present invention relates to the purification of aliphatic taurate amides by liquid-liquid extraction, notably to remove free fatty carboxylic acids. Such aliphatic taurate amides may notably be obtained by reaction of a carboxylic acid with alkali metal salt of N-methyl taurine.

The present invention relates to the purification of aliphatic taurate amides by liquid-liquid extraction, notably to remove free fatty carboxylic acids. Such aliphatic taurate amides may notably be obtained by reaction of a carboxylic acid with alkali metal salt of N-methyl taurine.

-Substituted -amino acids, -substituted -amino acid derivatives, and -substituted -amino acid analogs and (bio)isosteres and their use as chemotherapeutic agents are disclosed. The -substituted -amino acid derivatives and -substituted -amino acid analogs and (bio)isosteres are selective LAT1/4F2hc substrates and exhibit rapid uptake and retention in tumors expressing the LAT1/4F2hc transporter. Methods of synthesizing the -substituted -amino acid derivatives and -substituted -amino acid analogs and methods of using the compounds for treating cancer are also disclosed. The -substituted -amino acid derivatives and -substituted -amino acid analogs exhibit selective uptake in tumor cells expressing the LAT1/4F2hc transporter and accumulate in cancerous cells when administered to a subject in vivo. The -substituted -amino acid derivatives and -substituted -amino acid analogs and (bio)isosteres exhibit cytotoxicity toward several tumor types.

-Substituted -amino acids, -substituted -amino acid derivatives, and -substituted -amino acid analogs and (bio)isosteres and their use as chemotherapeutic agents are disclosed. The -substituted -amino acid derivatives and -substituted -amino acid analogs and (bio)isosteres are selective LAT1/4F2hc substrates and exhibit rapid uptake and retention in tumors expressing the LAT1/4F2hc transporter. Methods of synthesizing the -substituted -amino acid derivatives and -substituted -amino acid analogs and methods of using the compounds for treating cancer are also disclosed. The -substituted -amino acid derivatives and -substituted -amino acid analogs exhibit selective uptake in tumor cells expressing the LAT1/4F2hc transporter and accumulate in cancerous cells when administered to a subject in vivo. The -substituted -amino acid derivatives and -substituted -amino acid analogs and (bio)isosteres exhibit cytotoxicity toward several tumor types.

The invention relates to compounds of use as targeted cytotoxic agents and methods of use thereof. In particular, the invention relates to prodrugs that are substantially resistant to human AKR1C3 enzyme metabolism, methods of cell ablation using said compounds and methods of treatment of cancer and other hyperproliferative disorders using said compounds.

The invention relates to compounds of use as targeted cytotoxic agents and methods of use thereof. In particular, the invention relates to prodrugs that are substantially resistant to human AKR1C3 enzyme metabolism, methods of cell ablation using said compounds and methods of treatment of cancer and other hyperproliferative disorders using said compounds.