Makefiles: difficulty with syntax for inference rule with obj files in subdirectory (Make newbie)

One last Make question (for now!)

******************
IN BRIEF:
I'm having difficulty with the ".cpp.obj" style syntax for automatically 
creating any required .obj file from its corresponding .cpp file.

I'm trying to change this:
$(FULL_LIST_OF_OBJECT_FILES_WITH_PATHS) : $(OUTPUT_PATH)/%.obj: %.cpp
#works

to something like this:
{}.cpp{$(OUTPUT_PATH)}.obj:
#doesn't work

So I'm hoping somebody can please help me with the syntax...!


******************
IN DETAIL:
I'm building a set of object files in a subdirectory from a set of .cpp 
files in the current directory. I've got it working fine by explicitly 
listing the object files:

#####################################
# this works a treat:
OUTPUT_PATH = ./Subfolder
TARGET_EXE = ./Subfolder/Foo.exe
FULL_OBJ_LIST = ./Subfolder/Foo.obj\
  ./Subfolder/Bar.obj\
  ./Subfolder/Another.obj

# ...

# link step
$(TARGET_EXE) : $(FULL_OBJ_LIST)
 link /OUT:$(TARGET_EXE) $(FULL_OBJ_LIST)

# compile step
$(FULL_OBJ_LIST) : $(OUTPUT_PATH)/%.obj: %.cpp
 $(CC) $(SWITCHES) $*.cpp
#####################################

This works absolutely fine. (Took me ages to get to this stage!) ;)

Now I've been experimenting with implicit/inference rules (not quite sure of 
the terminology? -- the .cpp.obj style syntax) to achieve the same thing 
without having to refer to FULL_OBJ_LIST in the compile step ... but without 
any luck. :(

Here are my best attempts:

#####################################
# ATTEMPT A:
#####################################
# alternative compile step
{}.cpp{$(OUTPUT_PATH)}.obj:
 $(CC) $(SWITCHES) $*.cpp
# error:
# target `{}.cpp{./Subfolder}.obj' doesn't match the target pattern
#####################################

#####################################
# ATTEMPT B:
#####################################
# alternative compile step
{}.cpp{$(OUTPUT_PATH)}.obj: $(OUTPUT_PATH)/%.obj:
 $(CC) $(SWITCHES) $*.cpp
# error:
# No rule to make target `Subfolder/Foo.obj', needed by `Subfolder/Foo.exe'.
#####################################


Any idea what I'm doing wrong?

Thanks in advance!
Andy