A process for producing an amine which is characterized by reacting an imine with a nucleophilic compound (except a trialkylsilyl vinyl ether) in the presence of a phosphoric acid derivative represented by the formula (1):
wherein A
1
represents a spacer; X
1
and X
2
represent each independently a divalent nonmetal atom or a divalent nonmetal atomic group; and Y
1
is oxygen or sulfur. The invention provides a process by which amines (particularly optically active amines) useful as intermediates of medicines, agricultural chemicals, or the like can be produced without special post-treatment in high yield at high optical purity; and phosphoric acid derivatives (particularly optically active phosphoric acid derivatives) useful in the production of the amines.
Phosphine-Initiated General Base Catalysis: Facile Access to Benzannulated 1,3-Diheteroatom Five-Membered Rings via Double-Michael Reactions of Allenes
作者:Judy Szeto、Vardhineedi Sriramurthy、Ohyun Kwon
DOI:10.1021/ol201730q
日期:2011.10.21
General base-catalyzed double-Michael reactions of allenes with various dinucleophiles are described. The reactions are facilitated most efficiently by a catalytic amount of trimethylphosphine, affording six types of C2-functionalized benzannulated five-membered heterocycles: benzimidazolines, benzoxazolines, benzothiazolines, 1,3-benzodioxoles, 1,3-benzoxathioles, and 1,3-benzodithioles. This atom-economical
Syntheses of various symmetrical naphthalenophanes and anthracenophanes via a Diels–Alder reaction between syn-[2.2](5,8)phthalazinophane derivatives and some selected dienophiles as well as the synthesis of other symmetrical heterophanes
作者:Ashraf A. Aly
DOI:10.1039/b211150k
日期:2003.2.11
The syntheses of various classes of unreported naphthalenophanes, anthracenophanes and heterophanes are herein reported. The key to their successful preparation depends on the synthesis of syn-4,7,14,17-tetra(phenyl and chloro)-[2.2](5,8)phthalazinophanes as well as syn-4,5,6,7,14,15,16,17-octahydro[2.2](5,8)phthalazinophane- 4,7,14,17-tetraone and 4,5,12,13-tetrakis(methoxycarbonyl)-[2.2]paracyclophane
The present invention relates to compounds of formula (1) or (2) which are useful as radioprotective agents.
wherein
n is an integer from 0 to 3,
m is an integer from 4 to 9,
Z is a C₂-C₆ alkylene group,
A is H, -SH, -SPO₃H₂, -N(CH₂)q-SH, -N(CH₂)q-SPO₃H₂, wherein q is an integer 2 to 4, and
B₁ and B₂ are each independently H, -(CH₂)q-SH, or -(CH₂)q-SPO₃H₂,
wherein
n is an integer from 0 to 3,
Z is a C₂-C₆ alkylene group,
A is H, -SH, -SPO₃H₂, -N(CH₂)q-SH, -N(CH₂)q-SPO₃H₂, wherein q is an integer 2 to 4, and
B₁ and B₂ are each independently H, -(CH₂)q-SH, or -(CH₂)q-SPO₃H₂,
with the proviso that at least one of A, B₁ and B₂ is other than H.
本发明涉及可用作辐射防护剂的式(1)或(2)化合物。
其中
n 是 0 至 3 的整数、
m 是 4 至 9 的整数、
Z 是 C₂-C₆ 亚烷基、
A 是 H、-SH、-SPO₃H₂、-N(CH₂)q-SH、-N(CH₂)q-SPO₃H₂,其中 q 是 2 至 4 的整数,以及
B₁ 和 B₂ 各自独立地为 H、-(CH₂)q-SH 或 -(CH₂)q-SPO₃H₂、
其中
n 是 0 至 3 的整数、
Z 是 C₂-C₆ 亚烷基、
A 是 H、-SH、-SPO₃H₂、-N(CH₂)q-SH、-N(CH₂)q-SPO₃H₂,其中 q 是 2 至 4 的整数,以及
B₁ 和 B₂ 各自独立地为 H、-(CH₂)q-SH 或-(CH₂)q-SPO₃H₂、
但 A、B₁ 和 B₂ 中至少有一个不是 H。