Substituent effects in the double diastereotopic differentiation of α-diazophosphonates via intramolecular cyclopropanation
摘要:
The investigation of substituent effects in the double diastereotopic differentiation of substituted alpha-diazophosphonates using intramolecular cyclopropanation catalyzed by Rh-2(OAc)(4) is reported. Carbene facial selectivity in these transformations is dictated by substrate control in either of two ways: (i) exploitation of (R)-pantolactone as an auxiliary incorporated into the carboester functionality while probing olefinic substituent effects, or (ii) utilization of chiral, non-racemic allylic alcohols incorporated into the phosphonate moiety. (C) 2003 Elsevier Science Ltd. All rights reserved.
Substituent effects in the double diastereotopic differentiation of α-diazophosphonates via intramolecular cyclopropanation
摘要:
The investigation of substituent effects in the double diastereotopic differentiation of substituted alpha-diazophosphonates using intramolecular cyclopropanation catalyzed by Rh-2(OAc)(4) is reported. Carbene facial selectivity in these transformations is dictated by substrate control in either of two ways: (i) exploitation of (R)-pantolactone as an auxiliary incorporated into the carboester functionality while probing olefinic substituent effects, or (ii) utilization of chiral, non-racemic allylic alcohols incorporated into the phosphonate moiety. (C) 2003 Elsevier Science Ltd. All rights reserved.
A method for producing an allyl compound having a compositional formula different from that of an allyl starting material compound, which comprises reacting the allyl starting material compound with an oxygen nucleophilic agent having a structure different from that of the allyl starting material compound in the presence of a catalyst containing at least one transition metal compound containing a transition metal selected from the group consisting of transition metals belonging to Group 8 to Group 10 of the Periodic Table and a monodentate phosphite compound having a structure of the following formula (1):
P(OR
1
)(OR
2
)(OR
3
) (1)
wherein R
1
, R
2
and R
3
are respectively independently an alkyl group which may have a substituent, carbon chains of R
1
, R
2
and R
3
may have at least one carbon-carbon double bond or triple bond, and at least two optional groups of R
1
, R
2
and R
3
may bond to each other to form at least one cyclic structure.
Nonaqueous electrolyte solution, electricity storage device using same, and phosphonoformic acid compound used in same
申请人:UBE INDUSTRIES, LTD.
公开号:US10374256B2
公开(公告)日:2019-08-06
The present invention provides a nonaqueous electrolytic solution capable of suppressing worsening of heat stability of a negative electrode and improving safety of an energy storage device while maintaining high-load charging and discharging cycle properties at a high temperature, an energy storage device using the same, and a phosphonoformic acid compound to be used for the same. The nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent contains 0.001 to 5% by mass of at least one selected from a phosphonoformic acid compound having at least one carbon-carbon unsaturated bond, which is represented by the following general formula (I), and a phosphonoformic acid compound having a carbon-carbon unsaturated bond or two phosphonocarbonyl groups, which is represented by the following general formula (II).
In the formula (I), each of R1 to R3 is an aliphatic organic group, provided that at least one of R1 to R3 represents a carbon-carbon unsaturated bond-containing aliphatic organic group.
In the formula (II), each of R4 and R5 represents an alkyl group, a cycloalkyl group, or an aryl group, and R4 and R5 may be bonded to each other to form a ring structure. m represents 1 or 2; when m is 1, then R6 represents an aryl group; when m is 2, then R6 represents an alkylene group, an alkenylene group, or an alkynylene group; and a part of hydrogen atoms of R4 to R6 may be substituted with a halogen atom.